maybe a raid got corrupted?

hi all
i've just finished formatting my nsa box, but i can't access the 2nd hard disk:
before it was accessible on /srv/devfoofoofoo/

now this is all i can master:

FDISK

Disk /dev/mtdblock0: 1 MiB, 1048576 bytes, 2048 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock1: 512 KiB, 524288 bytes, 1024 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock2: 512 KiB, 524288 bytes, 1024 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock3: 512 KiB, 524288 bytes, 1024 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock4: 10 MiB, 10485760 bytes, 20480 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes




Disk /dev/mtdblock6: 47.8 MiB, 50069504 bytes, 97792 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock7: 10 MiB, 10485760 bytes, 20480 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mtdblock8: 47.8 MiB, 50069504 bytes, 97792 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sda: 298.1 GiB, 320072933376 bytes, 625142448 sectors
Disk model: WDC WD3200KS-00P
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xd632e2ad

Device     Boot Start       End   Sectors   Size Id Type
/dev/sda1        2048 625141759 625139712 298.1G 83 Linux


Disk /dev/sdb: 2.7 TiB, 3000592982016 bytes, 5860533168 sectors
Disk model: WDC WD30EFRX-68E
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: D1070018-0D36-4566-AF9E-C1DC8C69E518

Device      Start        End    Sectors  Size Type
/dev/sdb1    2048     999423     997376  487M Linux swap
/dev/sdb2  999424 5860532223 5859532800  2.7T Microsoft basic data


Disk /dev/md0: 2.7 TiB, 3000079745024 bytes, 5859530752 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

LSBLK

root@openmediavault:~# lsblk
NAME      MAJ:MIN RM   SIZE RO TYPE   MOUNTPOINT
sda         8:0    0 298.1G  0 disk   
└─sda1      8:1    0 298.1G  0 part   /
sdb         8:16   0   2.7T  0 disk   
├─sdb1      8:17   0   487M  0 part   /srv/dev-disk-by-id-ata-WDC_WD30EFRX-68EUZ
└─sdb2      8:18   0   2.7T  0 part   
  └─md0     9:0    0   2.7T  0 linear 
mtdblock0  31:0    0     1M  0 disk   
mtdblock1  31:1    0   512K  0 disk   
mtdblock2  31:2    0   512K  0 disk   
mtdblock3  31:3    0   512K  0 disk   
mtdblock4  31:4    0    10M  0 disk   
mtdblock5  31:5    0    10M  0 disk   
mtdblock6  31:6    0  47.8M  0 disk   
mtdblock7  31:7    0    10M  0 disk   
mtdblock8  31:8    0  47.8M  0 disk

cat /proc/mdstat

cat /proc/mdstat 
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] 
md0 : active linear sdb2[0]
      2929765376 blocks super 1.2 0k rounding

MDADM

mdadm --examine /dev/sdb0
mdadm: cannot open /dev/sdb0: No such file or director

mdadm --examine /dev/sdb1
mdadm: No md superblock detected on /dev/sdb1.

mdadm --examine /dev/sdb2
/dev/sdb2:
          Magic : a92b4efc
        Version : 1.2
    Feature Map : 0x0
     Array UUID : ae0b0151:4a62050e:e73ef040:35ee8f4e
           Name : NSA325-v2:0
  Creation Time : Thu Jul 23 00:53:39 2015
     Raid Level : linear
   Raid Devices : 1

 Avail Dev Size : 5859530752 (2794.04 GiB 3000.08 GB)
  Used Dev Size : 0
    Data Offset : 2048 sectors
   Super Offset : 8 sectors
   Unused Space : before=1968 sectors, after=0 sectors
          State : clean
    Device UUID : 3eea33c8:e21226cb:66ec754c:06b06634

    Update Time : Thu Jul 23 00:53:39 2015
       Checksum : 5e28e2e5 - correct
         Events : 0

       Rounding : 0K

   Device Role : Active device 0
   Array State : A ('A' == active, '.' == missing, 'R' == replacing)

MOUNT

mount /dev/sdb2 /mnt
mount: /mnt: unknown filesystem type 'linux_raid_member'.
root@openmediavault:/#

i have no idea what swap is doing on /dev/sdb1
i have no idea why /dev/sdb2 is called linux raid member and microsoft basic data at the very same time

does anyone know whether there's an almost painless way to mount my /dev/sdb?



Edited 1 time(s). Last edit at 12/14/2019 11:52AM by Carlo.

I am only guessing here, did you have raid set up before you set up your nsa box?
raid usually has 2 equal drives set up. mine has 2- 5tb drives on a pogoplug but it all kinda works the same for this purpose.


first you might try:

nano /etc/fstab
add:
/dev/md0                                           /mnt      auto   rw,relatime,data=ordered       0      0

save then

mount /dev/md0 /mnt

you should at least get to your data.
let us know how it goes:)

Echowarrior108

device: pogoplug-pro v3

Currently running:
Debian GNU/Linux Bullseye 12-9-22
Linux 5.4.224-oxnas-tld-1 armv6l GNU/Linux 11-27-22

Oh, mounting md0 works

No idea why a raid is there, besides its involving just one partition..
Can I disassemble a raid without formatting?

The best thing you could do at this point is find a way to mount and back up all the data to a separate drive before attempting to remove raid configuration.I am no expert on raid other than having installed it but from what I read it can be taken out but most every forum insists on creating a backup first. more to come as its Christmas:) Merry Christmas!

Echowarrior108

device: pogoplug-pro v3

Currently running:
Debian GNU/Linux Bullseye 12-9-22
Linux 5.4.224-oxnas-tld-1 armv6l GNU/Linux 11-27-22