Debian on Synology DS215j

ZooMoo,

I did not have any luck requesting anything from Marvell in the past. I have most of the datasheets for the more popular Marvell SoCs, just not this Armada 375 SoC.

Developers' interest seem to stop cold after the reference board (armada-375-db) was mainline.

-bodhi
===========================
Forum Wiki
bodhi's corner (buy bodhi a beer)

This is not looking good without the docs.

What is the latest SoC / NAS you'd recommend that's supported?

ZooMoo,

> What is the latest SoC / NAS you'd recommend
> that's supported?

I don't know much about the latest models in the market. I have a few Synolgy DS116 (1-bay) and Thecus N2350 (2-bay) and I like both, especially the DS116. I'm supporting these here.

-bodhi
===========================
Forum Wiki
bodhi's corner (buy bodhi a beer)

Thanks Bodhi, I've been looking around and not much shows up.

Going back to the DS215j, I want to try to compile and use the Synology DSM kernel (v3.2.4) with your Debian DeBootstrap install.

How do I compile a kernel from source and use it within a Debian Debootstrap install. I guess I'll need some of Synologies custom libraries, but I'm not sure

I've searched online and I could not find anything for this use-case.

I'd need to cross-compile it, but I hope there is some advice or a guide that makes this more clear.

ZooMoo,

> How do I compile a kernel from source and use it
> within a Debian Debootstrap install. I guess I'll
> need some of Synologies custom libraries, but I'm
> not sure
>
> I've searched online and I could not find anything
> for this use-case.
>
> I'd need to cross-compile it, but I hope there is
> some advice or a guide that makes this more clear.

There are numerous tutorials on the net about how to build Debian system using debootstrap. For example, see Debian site:

https://wiki.debian.org/Debootstrap

Building custom kernels is needed when Debian does not have support for a specific board. Or the official Debian kernel does not provide all capabilities that you need. That's what I provided here for the Marvell Kirkwoodd SoCs and Armada SoCs. You can also easily find many tutorials on the net about compiling Linux kernel. For example, to cross compile, look for Linaro toolchain.

Sorry, I won't provide hand-on tutorials here, it would take too much of my time. My own policy here is I will only help with something that you cannot find anywhere else.

-bodhi
===========================
Forum Wiki
bodhi's corner (buy bodhi a beer)

It's' not so simple given the Synology 3.x kernel needs GCC up to version 8. Which is too old and not available unless running a legacy distribution in a VM.

To build the ancient and modified Synology kernel you need to use their chroot'ed build environment.

Details for setting up the environment are given at:
https://help.synology.com/developer-guide/getting_started/gettingstarted.html

It is focused on application development for the DSM platform, but it turns out you can also build the kernel the same way.


Install necessary packages on your host.
NOTE: I'm using devuan which is missing the dbus-user-session as it depends on systemd. However, it seems it didn't prevent the kernel from being built.

./src/SynologyOpenSource/toolkit$ sudo apt-get install cifs-utils python3 python3-pip

Clone installation script.

./src/SynologyOpenSource/toolkit$ torify git clone https://github.com/SynologyOpenSource/pkgscripts-ng.git
./src/SynologyOpenSource/toolkit$ cd pkgscripts-ng/

./src/SynologyOpenSource/toolkit/pkgscripts-ng$ git checkout DSM7.1

./src/SynologyOpenSource/toolkit/pkgscripts-ng$ sudo ./EnvDeploy -v 7.1 -p armada375
...
[2025-06-29 13:40:19,642] INFO: All task finished.

Build kernel by copying the synology kernel source txz to the "source" folder.

./src/SynologyOpenSource/toolkit/pkgscripts-ng$ cd ..
./src/SynologyOpenSource/toolkit/$ mkdir source && cd source
./src/SynologyOpenSource/toolkit/source$ wget https://global.synologydownload.com/download/ToolChain/Synology%20NAS%20GPL%20Source/7.1.1-42962/armada375/linux-3.x.txz
./src/SynologyOpenSource/toolkit/source$ tar vxf linux-3.x.txz

Build kernel source using pkgscripts tool. There were errors, but it built the zImage despite this.

./src/SynologyOpenSource/toolkit/source$ cd ../pkgscripts-ng/
./src/SynologyOpenSource/toolkit/pkgscripts-ng$ sudo ./PkgCreate.py -v 7.1 -p armada375 -c linux-3.x

########################################################
Error(s) occurred on project "linux-3.x"
########################################################
1 projects, 1 failed, 0 blocked.\n\n[Error] Check [/logs/error.build] for fixing errors.')

----------------------------------------------
============================================================
                Start to run "Build Package"                
------------------------------------------------------------
...
[armada375] env PackageName=linux-3.x /pkgscripts-ng/SynoBuild --armada375 -c --min-sdk 6.2 linux-3.x
Set cache size limit to 8.0 Gbytes
Statistics cleared
[INFO] projectList=linux-3.x
[INFO] Start to build linux-3.x.
[SCRIPT] build script: //source/linux-3.x/SynoBuildConf/build
[INFO] ======= Run build script =======
/source/linux-3.x/crypto/ocf/ep80579/Makefile:75: ICP_ROOT is undefined. Please set the path to EP80579 release package directory "-> setenv ICP_ROOT <path>"
/usr/local/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-size: 'arch/arm/boot/compressed/../../../../vmlinux': No such file
size: 'arch/arm/boot/compressed/../../../../vmlinux': No such file
./syno_check_env.sh
ARMADA375 platform found...
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/kconfig/conf.o
  SHIPPED scripts/kconfig/zconf.tab.c
  SHIPPED scripts/kconfig/zconf.lex.c
  SHIPPED scripts/kconfig/zconf.hash.c
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
scripts/kconfig/conf --oldconfig Kconfig
...
  LD [M]  sound/sound_firmware.ko
  LD [M]  sound/soundcore.ko
  AS      arch/arm/boot/compressed/piggy.lzma.o
  LD      arch/arm/boot/compressed/vmlinux
  OBJCOPY arch/arm/boot/zImage
  Kernel: arch/arm/boot/zImage is ready
  UIMAGE  arch/arm/boot/uImage
Image Name:   Linux-3.2.101
Created:      Sun Jun 29 15:13:51 2025
Image Type:   ARM Linux Kernel Image (uncompressed)
Data Size:    1933672 Bytes = 1888.35 kB = 1.84 MB
Load Address: 00008000
Entry Point:  00008000
  Image arch/arm/boot/uImage is ready
Error! /arch/arm/boot/uImage does not exist!
[Error] Build project fail!
Time cost: 00:00:26 [Build-->linux-3.x]
[INFO] Build linux-3.x finished!

Find the zImage:

./src/SynologyOpenSource/toolkit$ sudo find ./ -name zImage
./build_env/ds.armada375-7.1/source/linux-3.x/arch/arm/boot/zImage

./src/SynologyOpenSource/toolkit$ ll ./build_env/ds.armada375-7.1/source/linux-3.x/arch/arm/boot/zImage
-rwxr-xr-x 1 root root 1.9M Jun 29 17:13 ./build_env/ds.armada375-7.1/source/linux-3.x/arch/arm/boot/zImage*

Update the USB stick with the Synology 3.x kernel... who know if this will work for a kernel compiled with gcc 8.

NOTE: the doozan zImage is 5.0M whilst the synology zImage is 1.9M. I guess this is because the synology zImage is installed into the SPI chip, hence need to be small.

NOTE 2: no need to copy the DTS.

/media/usb/boot# cp -a /<PATH_TO_SOURCE>/build_env/ds.armada375-7.1/source/linux-3.x/arch/arm/boot/zImage zImage.fdt
/media/usb/boot# mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 -n synology-linux-3.x -d zImage.fdt uImage	
/media/usb/boot# cd && umount /media/usb

Insert USB into DS215j and run the usual incantations via minicom.

Marvell>> setenv usbActive 1
Marvell>> usb start
Marvell>> ext2load usb 0:1 0x02000000 /boot/uImage
5192845 bytes read in 637 ms (7.8 MiB/s)
Marvell>> ext2load usb 0:1 0x08000000 /boot/uInitrd
5257173 bytes read in 225 ms (22.3 MiB/s)
Marvell>> setenv bootargs 'console=ttyS0,115200 ip=off root=/dev/sda1 rw syno_hw_version=DS215j ihd_num=2 netif_num=1 flash_size=8'
Marvell>> bootm 0x02000000 0x08000000

Amazingly it boots, but it fails with the following errors and drops down to a initramfs prompt.

[   71.628934] Archive bit cmd:7ec67b40 not implement.
[   71.633909] Archive bit cmd:7ec67b08 not implement.

I could not find any help online. Is it because it is missing firmware or something?


Full log:
======================================================

BootROM - 1.51
Booting from SPI flash


General initialization - Version: 1.0.0
High speed PHY - Version: 0.1.1 (COM-PHY-V20) 
USB2 UTMI PHY initialized succesfully
USB2 UTMI PHY initialized succesfully
High speed PHY - Ended Successfully

DDR3 Training Sequence - Ver 5.7.1
TWSI Read failed
Error reading from TWSI
DDR3 Training Sequence - Run with PBS.
DDR3 Training Sequence - Ended Successfully 
BootROM: Image checksum verification PASSED

 __   __                      _ _
|  \/  | __ _ _ ____   _____| | |
| |\/| |/ _` | '__\ \ / / _ \ | |
| |  | | (_| | |   \ V /  __/ | |
|_|  |_|\__,_|_|    \_/ \___|_|_|
         _   _     ____              _
        | | | |   | __ )  ___   ___ | |_ 
        | | | |___|  _ \ / _ \ / _ \| __| 
        | |_| |___| |_) | (_) | (_) | |_ 
         \___/    |____/ \___/ \___/ \__| 
 ** LOADER **


U-Boot 2013.01-g5d1ab78 (Oct 27 2015 - 11:38:34) Marvell version: 2014_T2.0p3

mvBoardTwsiGet: Twsi Read fail
mvBoardIoExpValSet: Error: Read from IO Expander failed
Board: SYNO-DS215j
SoC:   MV88F6720 Rev A0
       running 2 CPUs
CPU:   ARM Cortex A9 MPCore (Rev 1) LE
       CPU 0
       CPU    @ 800 [MHz]
       L2     @ 400 [MHz]
       TClock @ 200 [MHz]
       DDR    @ 534 [MHz]
       DDR 16Bit Width, FastPath Memory Access, DLB Enabled
DRAM:  512 MiB

Map:   Code:		0x1fed2000:0x1ff93080
       BSS:		0x1ffefe10
       Stack:		0x1f9c1f20
       Heap:		0x1f9c2000:0x1fed2000

MMC:   MRVL_MMC: 0
SF: Detected MX25L6405D with page size 64 KiB, total 8 MiB
PCI-e 0: Detected No Link.
USB2.0 0: Host Mode
USB2.0 1: Device Mode
USB3.0 0: Host Mode
Board configuration detected:
	RGMII0 Module on MAC0
	PON ETH SERDES on MAC1 [SFP]
SERDES configuration:
	Lane #0: PCIe0
	Lane #1: SATA1
	Lane #2: SATA0
	Lane #3: USB3

Synology Model: DS215j
Fan Status: Good

Net:   egiga0, egiga1 [PRIME]
syno: network status self-checking
Using egiga1 device
## Warning: gatewayip needed but not set
## Warning: gatewayip needed but not set
ping failed; host 192.168.27.90 is not alive
SF: Detected MX25L6405D with page size 64 KiB, total 8 MiB
Erasing SPI flash....Writing to SPI flash.....done
syno: reset for network status 

BootROM - 1.51
Booting from SPI flash


General initialization - Version: 1.0.0
High speed PHY - Version: 0.1.1 (COM-PHY-V20) 
USB2 UTMI PHY initialized succesfully
USB2 UTMI PHY initialized succesfully
High speed PHY - Ended Successfully

DDR3 Training Sequence - Ver 5.7.1
TWSI Read failed
Error reading from TWSI
DDR3 Training Sequence - Run with PBS.
DDR3 Training Sequence - Ended Successfully 
BootROM: Image checksum verification PASSED
l
 __   __                      _ _
|  \/  | __ _ _ ____   _____| | |
| |\/| |/ _` | '__\ \ / / _ \ | |
| |  | | (_| | |   \ V /  __/ | |
|_|  |_|\__,_|_|    \_/ \___|_|_|
         _   _     ____              _
        | | | |   | __ )  ___   ___ | |_ 
        | | | |___|  _ \ / _ \ / _ \| __| 
        | |_| |___| |_) | (_) | (_) | |_ 
         \___/    |____/ \___/ \___/ \__| 
 ** LOADER **


U-Boot 2013.01-g5d1ab78 (Oct 27 2015 - 11:38:34) Marvell version: 2014_T2.0p3

mvBoardTwsiGet: Twsi Read fail
mvBoardIoExpValSet: Error: Read from IO Expander failed
Board: SYNO-DS215j
SoC:   MV88F6720 Rev A0
       running 2 CPUs
CPU:   ARM Cortex A9 MPCore (Rev 1) LE
       CPU 0
       CPU    @ 800 [MHz]
       L2     @ 400 [MHz]
       TClock @ 200 [MHz]
       DDR    @ 534 [MHz]
       DDR 16Bit Width, FastPath Memory Access, DLB Enabled
DRAM:  512 MiB

Map:   Code:		0x1fed2000:0x1ff93080
       BSS:		0x1ffefe10
       Stack:		0x1f9c1f20
       Heap:		0x1f9c2000:0x1fed2000

MMC:   MRVL_MMC: 0
SF: Detected MX25L6405D with page size 64 KiB, total 8 MiB
PCI-e 0: Detected No Link.
USB2.0 0: Host Mode
USB2.0 1: Device Mode
USB3.0 0: Host Mode
Board configuration detected:
	RGMII0 Module on MAC0
	PON ETH SERDES on MAC1 [SFP]
SERDES configuration:
	Lane #0: PCIe0
	Lane #1: SATA1
	Lane #2: SATA0
	Lane #3: USB3

Synology Model: DS215j
Fan Status: Good

Net:   egiga0, egiga1 [PRIME]
syno: network status self-checking
Using egiga1 device
## Warning: gatewayip needed but not set
## Warning: gatewayip needed but not set
ping failed; host 192.168.27.90 is not alive
SF: Detected MX25L6405D with page size 64 KiB, total 8 MiB
Erasing SPI flash....Writing to SPI flash.....done
syno: reset for network status 

BootROM - 1.51
Booting from SPI flash


General initialization - Version: 1.0.0
High speed PHY - Version: 0.1.1 (COM-PHY-V20) 
USB2 UTMI PHY initialized succesfully
USB2 UTMI PHY initialized succesfully
High speed PHY - Ended Successfully

DDR3 Training Sequence - Ver 5.7.1
TWSI Read failed
Error reading from TWSI
DDR3 Training Sequence - Run with PBS.
DDR3 Training Sequence - Ended Successfully 
BootROM: Image checksum verification PASSED

 __   __                      _ _
|  \/  | __ _ _ ____   _____| | |
| |\/| |/ _` | '__\ \ / / _ \ | |
| |  | | (_| | |   \ V /  __/ | |
|_|  |_|\__,_|_|    \_/ \___|_|_|
         _   _     ____              _
        | | | |   | __ )  ___   ___ | |_ 
        | | | |___|  _ \ / _ \ / _ \| __| 
        | |_| |___| |_) | (_) | (_) | |_ 
         \___/    |____/ \___/ \___/ \__| 
 ** LOADER **


U-Boot 2013.01-g5d1ab78 (Oct 27 2015 - 11:38:34) Marvell version: 2014_T2.0p3

mvBoardTwsiGet: Twsi Read fail
mvBoardIoExpValSet: Error: Read from IO Expander failed
Board: SYNO-DS215j
SoC:   MV88F6720 Rev A0
       running 2 CPUs
CPU:   ARM Cortex A9 MPCore (Rev 1) LE
       CPU 0
       CPU    @ 800 [MHz]
       L2     @ 400 [MHz]
       TClock @ 200 [MHz]
       DDR    @ 534 [MHz]
       DDR 16Bit Width, FastPath Memory Access, DLB Enabled
DRAM:  512 MiB

Map:   Code:		0x1fed2000:0x1ff93080
       BSS:		0x1ffefe10
       Stack:		0x1f9c1f20
       Heap:		0x1f9c2000:0x1fed2000

MMC:   MRVL_MMC: 0
SF: Detected MX25L6405D with page size 64 KiB, total 8 MiB
PCI-e 0: Detected No Link.
USB2.0 0: Host Mode
USB2.0 1: Device Mode
USB3.0 0: Host Mode
Board configuration detected:
	RGMII0 Module on MAC0
	PON ETH SERDES on MAC1 [SFP]
SERDES configuration:
	Lane #0: PCIe0
	Lane #1: SATA1
	Lane #2: SATA0
	Lane #3: USB3

Synology Model: DS215j
Fan Status: Good

Net:   egiga0, egiga1 [PRIME]
syno: network status self-checking
Using egiga1 device
## Warning: gatewayip needed but not set
## Warning: gatewayip needed but not set
ping failed; host 192.168.27.90 is not alive
skip auto reset......
SF: Detected MX25L6405D with page size 64 KiB, total 8 MiB
Erasing SPI flash....Writing to SPI flash.....done
Press Ctrl+C to abort autoboot in 3 second
Marvell>> <INTERRUPT>
Marvell>> 
Marvell>> sentetenv usbActive 1
Marvell>> usb start
(Re)start USB...
USB0:   Port (usbActive) : 
'usbActive' Error: invalid port number 1, switching to port 0
Interface (usbType = 3) : USB XHCI 1.00
scanning bus 0 for devices... 2 USB Device(s) found
       scanning usb for storage devices... 1 Storage Device(s) found
Marvell>> ext2load usb 0:1 0x02000000 /boot/uImage
1933736 bytes read in 499 ms (3.7 MiB/s)
Marvell>> ext2load usb 0:1 0x08000000 /boot/uInitrd
5257173 bytes read in 225 ms (22.3 MiB/s)
Marvell>> setenv bootargs 'console=ttyS0,115200 ip=off root=/dev/sda1 rw syno_hw_version=DS215j ihd_num=2 netif_num=1 flash_size=8'
Marvell>> bootm 0x02000000 0x08000000
## Booting kernel from Legacy Image at 02000000 ...
   Image Name:   synology-linux-3.x
   Created:      2025-07-09   7:26:28 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    1933672 Bytes = 1.8 MiB
   Load Address: 00008000
   Entry Point:  00008000
   Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 08000000 ...
   Image Name:   initramfs-6.6.2-mvebu-tld-1
   Created:      2023-12-12  22:03:52 UTC
   Image Type:   ARM Linux RAMDisk Image (gzip compressed)
   Data Size:    5257109 Bytes = 5 MiB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Uncompressing Lin done, booting th
[    0.000000] Booting Linux on physical CPU 0
[    0.000000] Linux version 3.2.101 (root@laptop) (gcc version 8.5.0 (GCC) ) #1 SMP Sun Jun 29 15:13:44 CST 2025
[    0.000000] CPU: ARMv7 Processor [414fc091] revision 1 (ARMv7), cr=10c53c7d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] Machine: Marvell Armada-375 Board
[    0.000000] Using UBoot passing parameters structure
[    0.000000] Memory policy: ECC disabled, Data cache writealloc
[    0.000000] PERCPU: Embedded 7 pages/cpu @8098d000 s5440 r8192 d15040 u32768
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048
[    0.000000] Kernel command line: console=ttyS0,115200 ip=off root=/dev/sda1 rw syno_hw_version=DS215j ihd_num=2 netif_num=1 flash_size=8
[    0.000000] Synology Hardware Version: DS215j-j
[    0.000000] Internal HD num: 2
[    0.000000] Internal netif num: 1
[    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[    0.000000] Memory: 512MB = 512MB total
[    0.000000] Memory: 508912k/508912k available, 15376k reserved, 0K highmem
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
[    0.000000]     vmalloc : 0xa0800000 - 0xf4000000   (1336 MB)
[    0.000000]     lowmem  : 0x80000000 - 0xa0000000   ( 512 MB)
[    0.000000]     modules : 0x7f000000 - 0x80000000   (  16 MB)
[    0.000000]       .text : 0x80008000 - 0x804b8000   (4800 kB)
[    0.000000]       .init : 0x804b8000 - 0x804e7540   ( 190 kB)
[    0.000000]       .data : 0x804e8000 - 0x8051ea40   ( 219 kB)
[    0.000000]        .bss : 0x8051ea64 - 0x8058818c   ( 422 kB)
[    0.000000] Hierarchical RCU implementation.
[    0.000000] NR_IRQS:528
[    0.000000] Initializing Armada-375 SoC Timers
[    0.000000] sched_clock: 32 bits at 25MHz, resolution 40ns, wraps every 171798ms
[    0.000167] Calibrating delay loop... 1594.16 BogoMIPS (lpj=7970816)
[    0.090039] pid_max: default: 32768 minimum: 301
[    0.090177] Security Framework initialized
[    0.090205] AppArmor: AppArmor initialized
[    0.090271] Mount-cache hash table entries: 512
[    0.091048] CPU: Testing write buffer coherency: ok
[    0.091189] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.091215] Calibrating local timer... 399.92MHz.
[    0.151068] CPU1: Booted secondary processor
[    0.190044] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.190098] Brought up 2 CPUs
[    0.190112] SMP: Total of 2 processors activated (3188.32 BogoMIPS).
[    0.190888] devtmpfs: initialized
[    0.200278] NET: Registered protocol family 16
[    0.210124] mvBoardTwsiGet: Twsi Read fail
[    0.210133] mvBoardIoExpValSet: Error: Read from IO Expander failed
[    0.210153] L310 cache controller enabled
[    0.210163] l2x0: 8 ways, CACHE_ID 0x410054c9, AUX_CTRL 0x02440000, Cache size: 262144 B
[    0.211733] 
[    0.211739] CPU Interface
[    0.211743] -------------
[    0.211748] SDRAM_CS0 ....base 000000000, size 512MB 
[    0.211764] SDRAM_CS1 ....disable
[    0.211772] SDRAM_CS2 ....disable
[    0.211779] SDRAM_CS3 ....disable
[    0.211786] DEVICE_CS0 ....base 0f4000000, size   1MB 
[    0.211803] DEVICE_CS1 ....no such
[    0.211823] DEVICE_CS2 ....no such
[    0.211841] DEVICE_CS3 ....no such
[    0.211859] PEX0_MEM ....base 0e0000000, size  16MB 
[    0.211872] PEX0_IO ....base 0f1100000, size   1MB 
[    0.211886] PEX1_MEM ....base 0e2000000, size  16MB 
[    0.211899] PEX1_IO ....base 0f1200000, size   1MB 
[    0.211913] INTER_REGS ....base 0f1000000, size   1MB 
[    0.211925] DMA_UART ....no such
[    0.211943] SPI_CS0 ....base 0f0000000, size  16MB 
[    0.211960] SPI_CS1 ....no such
[    0.211978] SPI_CS2 ....no such
[    0.211995] SPI_CS3 ....no such
[    0.212013] SPI_CS4 ....no such
[    0.212030] SPI_CS5 ....no such
[    0.212049] SPI_CS6 ....no such
[    0.212067] SPI_CS7 ....no such
[    0.212085] BOOT_ROM_CS ....no such
[    0.212103] DEV_BOOTCS ....base 0f2000000, size  32MB 
[    0.212119] USB3 ....no such
[    0.212137] CRYPT0_ENG ....base 0f4400000, size  64KB 
[    0.212154] CRYPT1_ENG ....base 0f4480000, size  64KB 
[    0.212168] PP2 - CPU 0 ....no such
[    0.212186] PP2 - CPU 1 ....no such
[    0.212204] 
[    0.212206]   Marvell Armada-375
[    0.212213]  SYNO-DS215j Board - 
[    0.212221]  Soc: MV88F6720 Rev A0
[    0.212225]  LE
[    0.212230]   LSP version: linux-3.2.58-2014_T2.0p2
[    0.212235]   IOCC: Support IO coherency.
[    0.212240]      -> Sync Barrier WA enabled
[    0.212245] 
[    0.213758] USB3 XHCI Device registered successfully
[    0.213768] Initialising USB2-1 HAL
[    0.214103] Registered Marvell USB2 EHCI host controller 1
[    0.214110] Initialising USB2-0 HAL
[    0.214432] Registered Marvell USB2 EHCI host controller 0
[    0.214440] -----> 0x18400 = 0x1040
[    0.214653] Synology Armada375 2-bay GPIO Init
[    0.221618] bio: create slab <bio-0> at 0
[    0.222493] SCSI subsystem initialized
[    0.223848] Switching to clocksource a375_clocksource
[    0.224294] AppArmor: AppArmor Filesystem Enabled
[    0.226363] NET: Registered protocol family 2
[    0.234094] IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
[    0.234405] TCP established hash table entries: 16384 (order: 5, 131072 bytes)
[    0.234648] TCP bind hash table entries: 16384 (order: 5, 131072 bytes)
[    0.234892] TCP: Hash tables configured (established 16384 bind 16384)
[    0.234900] TCP reno registered
[    0.234910] UDP hash table entries: 256 (order: 1, 8192 bytes)
[    0.234931] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
[    0.235139] NET: Registered protocol family 1
[    0.235336] Trying to unpack rootfs image as initramfs...
[    0.507404] Freeing initrd memory: 5132K
[    0.507470] PCIe: Checking physical bus #0: 
[    0.507477] no link, disabled
[    0.507483] PCIe: Checking physical bus #1: 
[    0.507489] no link, disabled
[    0.508197] Armada 375 hwmon thermal sensor initialized.
[    0.509516]   o	PPv2.1 Giga driver
[    0.509525]   o 4 Giga ports supported
[    0.509531]   o SKB recycle supported (Enabled)
[    0.509537]   o BM supported for CPU: 8 BM pools
[    0.509543]   o HWF supported
[    0.509548]   o RX Queue support: 8 Queues * 512 Descriptors
[    0.509556]   o TX Queue support: 8 Queues * 1024 Descriptors
[    0.509562]   o Driver debug messages enabled
[    0.509567] 
[    0.514450]   o Loading network interface(s) for port #1: cpu_mask=0x3, mtu=1500
[    0.515154] 	o Port 1 is connected to Linux netdevice
[    0.515172] 	o giga p=1: phy=1,  mtu=1500, mac=<MAC_ADDRESS>, speed=AutoNeg (platform)
[    0.518154] 	o eth0, ifindex = 2, GbE port = 1
[    0.518165] 
[    0.518167]     o eth0, phy chipid = 1410dd0, Support WOL = 32
[    0.518181] 
[    0.518377] cesadev_init(804c0f2c)
[    0.519491] audit: initializing netlink socket (disabled)
[    0.519526] type=2000 audit(0.500:1): initialized
[    0.582323] VFS: Disk quotas dquot_6.5.2
[    0.582459] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[    0.583060] msgmni has been set to 1003
[    0.584235] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
[    0.584247] io scheduler noop registered
[    0.584301] io scheduler cfq registered (default)
[    0.584379] mv_xor_shared mv_xor_shared.0: Marvell shared XOR driver
[    0.584417] mv_xor_shared mv_xor_shared.1: Marvell shared XOR driver
[    0.620015] mv_xor mv_xor.0: Marvell XOR: ( xor cpy )
[    0.660046] mv_xor mv_xor.1: Marvell XOR: ( xor fill cpy )
[    0.680020] mv_xor mv_xor.2: Marvell XOR: ( xor )
[    0.699992] mv_xor mv_xor.3: Marvell XOR: ( fill cpy )
[    0.788213] Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
[    0.850837] serial8250.0: ttyS0 at MMIO 0xf1012000 (irq = 44) is a 16550A
[    1.566364] console [ttyS0] enabled
[    1.600365] serial8250.1: ttyS1 at MMIO 0xf1012100 (irq = 45) is a 16550A
[    1.648061] brd: module loaded
[    1.651148] Loading iSCSI transport class v2.0-870.
[    1.657345] sata_mv sata_mv.0: slots 32 ports 2
[    1.664378] scsi0 : sata_mv
[    1.667697] scsi1 : sata_mv
[    1.670908] ata1: SATA max UDMA/133 irq 58
[    1.675028] ata2: SATA max UDMA/133 irq 58
[   10.218172] ata1: link is slow to respond, please be patient (ready=0)
[   14.717328] ata1: SRST failed (errno=-16)
[   14.721360] ata1: SRST fail, set srst fail flag
[   15.887119] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl F300)
[   15.893423] ata1: link reset sucessfully clear error flags
[   15.917336] ata1.00: ATA-9: WDC WD40PURX-64GVNY0, 80.00A80, max UDMA/133
[   15.924075] ata1.00: 7814037168 sectors, multi 0: LBA48 NCQ (depth 31/32)
[   15.947313] ata1.00: configured for UDMA/133
[   15.967211] scsi 0:0:0:0: Direct-Access     WDC      WD40PURX-64GVNY0         80.0 PQ: 0 ANSI: 5
[   15.976951] sd 0:0:0:0: [sda] 7814037168 512-byte logical blocks: (4.00 TB/3.63 TiB)
[   15.984753] sd 0:0:0:0: [sda] 4096-byte physical blocks
[   15.990177] sd 0:0:0:0: [sda] Write Protect is off
[   15.995064] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[   16.066510]  sda: unknown partition table
[   16.071230] sd 0:0:0:0: [sda] Attached SCSI disk
[   18.967624] Delay 5 seconds to wait for disk 2 ready.
[   24.305546] ata2: SATA link down (SStatus 0 SControl F300)
[   24.312482] physmap platform flash device: 00800000 at f0000000
[   24.320024] SPI Serial flash detected @ 0xf0000000, 8192KB (128sec x 64KB)
[   24.326959] Searching for RedBoot partition table in SYNOMTD-0 at offset 0x7f0000
[   24.375719] 6 RedBoot partitions found on MTD device SYNOMTD-0
[   24.381581] SYNOMTD flash bank 0: Using RedBoot partition definition
[   24.387969] Creating 6 MTD partitions on "SYNOMTD-0":
[   24.393050] 0x000000000000-0x0000000f0000 : "RedBoot"
[   24.399352] 0x0000000f0000-0x0000003c0000 : "zImage"
[   24.405390] 0x0000003c0000-0x0000007d0000 : "rd.gz"
[   24.411443] 0x0000007d0000-0x0000007e0000 : "vendor"
[   24.416538] vender Mac0 address : <MAC_ADDRESS_2>
[   24.421444] vender Mac1 doesn't set ucSum:0x00 Buf:0x00 Sum:0.
[   24.427373] vender Mac2 doesn't set ucSum:0x00 Buf:0x00 Sum:0.
[   24.433235] vender Mac3 doesn't set ucSum:0x00 Buf:0x00 Sum:0.
[   24.439104] serial number='1560MPN098403'
[   24.444053] 0x0000007e0000-0x0000007f0000 : "RedBoot Config"
[   24.451073] 0x0000007f0000-0x000000800000 : "FIS directory"
[   24.457897] i2c /dev entries driver
[   24.462460] md: raid1 personality registered for level 1
[   24.467866] cpuidle: using governor ladder
[   24.472199] TCP cubic registered
[   24.475447] NET: Registered protocol family 17
[   24.479936] Registering the dns_resolver key type
[   24.484739] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
[   24.493082] registered taskstats version 1
[   24.497938] Freeing init memory: 188K
[   24.504508] Archive bit cmd:7eeccd50 not implement.
[   24.513202] Archive bit cmd:7ea94d20 not implement.
[   24.521492] Archive bit cmd:7ed5ad20 not implement.
[   24.529676] Archive bit cmd:7ea89d20 not implement.
[   24.537830] Archive bit cmd:7edc2d10 not implement.
[   24.546084] Archive bit cmd:7ee0fce0 not implement.
[   24.554497] Archive bit cmd:7ea7bce0 not implement.
[   24.563041] Archive bit cmd:7ee97d20 not implement.
Loading, please wait...
[   24.571682] Archive bit cmd:7e8c7ce0 not implement.
[   24.580186] Archive bit cmd:7e9e4d00 not implement.
[   24.588467] Archive bit cmd:7ebf7d00 not implement.
[   24.596731] Archive bit cmd:7ea92cf0 not implement.
[   24.604949] Archive bit cmd:7eeebcf0 not implement.
[   24.613136] Archive bit cmd:7ebb5d10 not implement.
[   24.621296] Archive bit cmd:7e884cd0 not implement.
[   24.635722] Archive bit cmd:7eac7ba0 not implement.
[   24.644662] Archive bit cmd:7e8dab50 not implement.
[   24.653181] Archive bit cmd:7ee6db80 not implement.
[   24.661836] Archive bit cmd:7edd3b60 not implement.
[   24.670445] Archive bit cmd:7ebe5b90 not implement.
[   24.679312] Archive bit cmd:7ef56b70 not implement.
[   24.688210] Archive bit cmd:7eb7bb70 not implement.
[   24.697109] Archive bit cmd:7ec8ab70 not implement.
[   24.719671] Archive bit cmd:7ed12be8 not implement.
Starting systemd-udevd version 2[   24.728233] Archive bit cmd:7ed12ab8 not implement.
52.19-1~deb12u1
[   24.751007] Archive bit cmd:7efedc18 not implement.
[   24.787195] Archive bit cmd:7e83ec18 not implement.
[   25.147412] Archive bit cmd:7ee15c38 not implement.
Begin: Loading essential drivers ... done.
[   25.158559] Archive bit cmd:7ede4b90 not implement.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/lo[   25.173849] Archive bit cmd:7ecc7b60 not implement.
cal-top ... done.
Begin: Running /scripts/local-premount ... done.
[   25.197257] Archive bit cmd:7efaec18 not implement.
Begin: Waiting for root file system ... [   25.208138] Archive bit cmd:7e9eab90 not implement.
[   26.219966] Archive bit cmd:7eab8b80 not implement.
Begin: Running /scripts/local-block ... done.
[   26.230979] Archive bit cmd:7ec01b90 not implement.
[   27.249736] Archive bit cmd:7efd7b80 not implement.
Begin: Running /scripts/local-block ... done.
[   27.260733] Archive bit cmd:7ed3eb90 not implement.
[   28.279575] Archive bit cmd:7ef01b80 not implement.
Begin: Running /scripts/local-block ... done.
[   28.290582] Archive bit cmd:7eb6cb90 not implement.
[   29.309369] Archive bit cmd:7ecbab80 not implement.
Begin: Running /scripts/local-block ... done.
[   29.320349] Archive bit cmd:7e9deb90 not implement.
[   30.339213] Archive bit cmd:7efe7b80 not implement.
Begin: Running /scripts/local-block ... done.
[   30.350207] Archive bit cmd:7e81fb90 not implement.
[   31.368993] Archive bit cmd:7eaa8b80 not implement.
Begin: Running /scripts/local-block ... done.
[   31.380015] Archive bit cmd:7e96bb90 not implement.
[   32.398796] Archive bit cmd:7ece1b80 not implement.
Begin: Running /scripts/local-block ... done.
[   32.409771] Archive bit cmd:7ec4fb90 not implement.
[   33.438589] Archive bit cmd:7ea71b80 not implement.
Begin: Running /scripts/local-block ... done.
[   33.449635] Archive bit cmd:7eb6ab90 not implement.
[   34.478429] Archive bit cmd:7eb4fb80 not implement.
Begin: Running /scripts/local-block ... done.
[   34.489454] Archive bit cmd:7ee3eb90 not implement.
[   35.518200] Archive bit cmd:7ea06b80 not implement.
Begin: Running /scripts/local-block ... done.
[   35.529224] Archive bit cmd:7e8efb90 not implement.
[   36.558034] Archive bit cmd:7ec9fb80 not implement.
Begin: Running /scripts/local-block ... done.
[   36.569042] Archive bit cmd:7ecf6b90 not implement.
[   37.597815] Archive bit cmd:7ed9eb80 not implement.
Begin: Running /scripts/local-block ... done.
[   37.608835] Archive bit cmd:7ea27b90 not implement.
[   38.637665] Archive bit cmd:7ea94b80 not implement.
Begin: Running /scripts/local-block ... done.
[   38.648686] Archive bit cmd:7eb63b90 not implement.
[   39.667439] Archive bit cmd:7ebb0b80 not implement.
Begin: Running /scripts/local-block ... done.
[   39.678451] Archive bit cmd:7ee5cb90 not implement.
[   40.697277] Archive bit cmd:7e866b80 not implement.
Begin: Running /scripts/local-block ... done.
[   40.708288] Archive bit cmd:7ee2cb90 not implement.
[   41.727045] Archive bit cmd:7e828b80 not implement.
Begin: Running /scripts/local-block ... done.
[   41.738047] Archive bit cmd:7e99ab90 not implement.
[   42.756872] Archive bit cmd:7eba6b80 not implement.
Begin: Running /scripts/local-block ... done.
[   42.767880] Archive bit cmd:7eb6fb90 not implement.
[   43.786656] Archive bit cmd:7eab9b80 not implement.
Begin: Running /scripts/local-block ... done.
[   43.797676] Archive bit cmd:7ee6cb90 not implement.
[   44.816515] Archive bit cmd:7e83db80 not implement.
Begin: Running /scripts/local-block ... done.
[   44.827470] Archive bit cmd:7ef68b90 not implement.
[   45.846284] Archive bit cmd:7edebb80 not implement.
Begin: Running /scripts/local-block ... done.
[   45.857284] Archive bit cmd:7ee2cb90 not implement.
[   46.876117] Archive bit cmd:7ed1bb80 not implement.
Begin: Running /scripts/local-block ... done.
[   46.887119] Archive bit cmd:7e950b90 not implement.
[   47.905910] Archive bit cmd:7e9c0b80 not implement.
Begin: Running /scripts/local-block ... done.
[   47.916932] Archive bit cmd:7e94bb90 not implement.
[   48.935704] Archive bit cmd:7ebb1b80 not implement.
Begin: Running /scripts/local-block ... done.
[   48.946716] Archive bit cmd:7ebdeb90 not implement.
[   49.965513] Archive bit cmd:7e953b80 not implement.
Begin: Running /scripts/local-block ... done.
[   49.976528] Archive bit cmd:7eb73b90 not implement.
[   50.995329] Archive bit cmd:7ec91b80 not implement.
Begin: Running /scripts/local-block ... done.
[   51.006343] Archive bit cmd:7ec01b90 not implement.
[   52.025131] Archive bit cmd:7e835b80 not implement.
Begin: Running /scripts/local-block ... done.
[   52.036253] Archive bit cmd:7eefdb90 not implement.
[   53.054920] Archive bit cmd:7ef9bb80 not implement.
Begin: Running /scripts/local-block ... done.
[   53.065927] Archive bit cmd:7ee88b90 not implement.
[   54.084762] Archive bit cmd:7edcfb80 not implement.
Begin: Running /scripts/local-block ... done.
[   54.095805] Archive bit cmd:7ec7db90 not implement.
[   55.114536] Archive bit cmd:7e9f7b80 not implement.
Begin: Running /scripts/local-block ... done.
[   55.125543] Archive bit cmd:7ec18b90 not implement.
[   56.144379] Archive bit cmd:7ebc5b80 not implement.
Begin: Running /scripts/local-block ... done.
done.
Gave up waiting for root f[   56.157031] Archive bit cmd:7ed91b90 not implement.
ile system device.  Common problems:
 - Boot args (cat /proc/cm[   56.167102] Archive bit cmd:7e97cb00 not implement.
dline)
   - Check rootdelay= (d[   56.176025] Archive bit cmd:7e9feb10 not implement.
id the system wait long enough?)
 - Missing mod[   56.184147] Archive bit cmd:7e9abb40 not implement.
ules (cat /proc/modules; ls /dev)
chvt: can't open console
ALERT!  /dev/sda1 does not exist.  Dropping to a shell!


BusyBox v1.35.0 (Debian 1:1.35.0-4+b3) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs) ls
[   71.628934] Archive bit cmd:7ec67b40 not implement.
[   71.633909] Archive bit cmd:7ec67b08 not implement.
bin      dev      init     proc     run      scripts  tmp      var
conf     etc      lib      root     sbin     sys      usr

ZooMoo,

> To build the ancient and modified Synology kernel
> you need to use their chroot'ed build
> environment.

> Amazingly it boots, but it fails with the
> following errors and drops down to a initramfs
> prompt.
>
>

> [   71.628934] Archive bit cmd:7ec67b40 not
> implement.
> [   71.633909] Archive bit cmd:7ec67b08 not
> implement.
>

>
>
> I could not find any help online. Is it because it
> is missing firmware or something?

I vaguely remember from a long time ago, this probably was the "kernel too old" error. You can try running this Debian stretch rootfs.

Debian-4.12.4-mvebu-tld-1-rootfs-bodhi.tar.bz2

md5:
e18a9df63e9de5e2c19265b21d081dcb
sha256:
87b283df02e34a6217f269f53d20816d885802e9148330455c15a788e38e891b

-bodhi
===========================
Forum Wiki
bodhi's corner (buy bodhi a beer)

mmm I'm getting a different sha256. I tried downloading twice, but got the same checksum.

$ sha256sum Debian-4.12.4-mvebu-tld-1-rootfs-bodhi.tar.bz2 
1ce340b3db2bfbd0e1d706ed1fda0d4dc8f79830ab5285b1f50299aee25ae2d7  Debian-4.12.4-mvebu-tld-1-rootfs-bodhi.tar.bz2

$ ll Debian-4.12.4-mvebu-tld-1-rootfs-bodhi.tar.bz2 
-rw-r--r-- 1 user1 user1 229M Jul 10 11:19 Debian-4.12.4-mvebu-tld-1-rootfs-bodhi.tar.bz2

Name: Debian-4.12.4-mvebu-tld-1-rootfs-bodhi.tar.bz2
Size: 239492598 bytes (228 MiB)
SHA256: 1ce340b3db2bfbd0e1d706ed1fda0d4dc8f79830ab5285b1f50299aee25ae2d7

Debian-4.12.4-mvebu-tld-1-rootfs-bodhi.tar.bz2 File extracts OK

Thanks @daviddyer.

I'll wait for bodhi to chime in with an update. Either his check sum is wrong or the file is wrong.

Those checksums are definitely wrong since they appear in the kernel thread for a different file.
https://forum.doozan.com/read.php?2,32146,page=1

Thanks guys,

I was in transit. Just settled in, and I'll check the checksum. Most probably a copy/paste error.

-bodhi
===========================
Forum Wiki
bodhi's corner (buy bodhi a beer)