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Cant resize Raid 5 bigger than 16TB (solved)

Posted by Fotex 
Cant resize Raid 5 bigger than 16TB (solved)
July 12, 2017 02:18PM
Hey folks I hope someone can help me with this.

I have been trying to grow an existing raid5.
The raid was 3 x 6TB disks and I added another 6tb disk, growing went fine and setting mdadm devices= 4 went fine.
When trying to resize md1 it complains about the size of the raid.
So I downloaded and installed e2fsprogs-1.43.4.
(https://askubuntu.com/questions/779754/how-do-i-resize-an-ext4-partition-beyond-the-16tb-limit)
However I can't resize it when the system is running from the array.

Then I made an ubuntu usb and booted up from ram, now Im not sure what to do next, fdisk -l does not show md0 and md1.
I dont know how to mount them when they are not listed in /dev/
What do you think, would it be better to just start from scratch and add a ssd disk for the filesystem or what can I do?

***EDIT***
Okay, I downloaded and installed mdadm.
Then did:
#mdadm --assemble --scan
Now md1 and md0 is showing, so far so good.

After following the guide at
(https://askubuntu.com/questions/779754/how-do-i-resize-an-ext4-partition-beyond-the-16tb-limit)

its now working.

ubuntu@ubuntu:~/e2fsprogs/resize$ sudo e2fsck -fn /dev/md1
e2fsck 1.42.13 (17-May-2015)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/md1: 1243841/549093376 files (0.2% non-contiguous), 2584103250/4392721152 blocks

ubuntu@ubuntu:~/e2fsprogs/resize$ sudo e2fsck -f /dev/md1
e2fsck 1.42.13 (17-May-2015)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/md1: 1243841/366063616 files (0.2% non-contiguous), 2572546718/2928480512 blocks
ubuntu@ubuntu:~/e2fsprogs/resize$ sudo ./resize2fs -b /dev/md1
resize2fs 1.43 (17-May-2016)
Converting the filesystem to 64-bit.
The filesystem on /dev/md1 is now 2928480512 (4k) blocks long.

ubuntu@ubuntu:~/e2fsprogs/resize$ sudo ./resize2fs -p /dev/md1
resize2fs 1.43 (17-May-2016)
Resizing the filesystem on /dev/md1 to 4392721152 (4k) blocks.
Begin pass 2 (max = 7433)
Relocating blocks XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 3 (max = 89371)
Scanning inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 5 (max = 3)
Moving inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/md1 is now 4392721152 (4k) blocks long.

Disk /dev/md1: 16.4 TiB, 17992585838592 bytes, 35141769216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 524288 bytes / 1572864 bytes

Disk /dev/sda: 5.5 TiB, 6001175126016 bytes, 11721045168 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
Disklabel type: gpt
Disk identifier: BB4721D2-D72F-4DA4-A36D-55DCF146E9D6

Device Start End Sectors Size Type
/dev/sda1 2048 999423 997376 487M BIOS boot
/dev/sda2 999424 6858751 5859328 2.8G Linux RAID
/dev/sda3 6858752 11721043967 11714185216 5.5T Linux RAID


Disk /dev/sdb: 5.5 TiB, 6001175126016 bytes, 11721045168 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
Disklabel type: gpt
Disk identifier: 79DE32E9-1E69-42DA-BFA7-24A299FC1454

Device Start End Sectors Size Type
/dev/sdb1 2048 999423 997376 487M BIOS boot
/dev/sdb2 999424 6858751 5859328 2.8G Linux RAID
/dev/sdb3 6858752 11721043967 11714185216 5.5T Linux RAID


Disk /dev/sdc: 5.5 TiB, 6001175126016 bytes, 11721045168 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
Disklabel type: gpt
Disk identifier: 4602F2BA-B6DA-45A6-9341-F844EEE68DCC

Device Start End Sectors Size Type
/dev/sdc1 2048 999423 997376 487M BIOS boot
/dev/sdc2 999424 6858751 5859328 2.8G Linux RAID
/dev/sdc3 6858752 11721043967 11714185216 5.5T Linux RAID


Disk /dev/sdd: 5.5 TiB, 6001175126016 bytes, 11721045168 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
Disklabel type: gpt
Disk identifier: BB4721D2-D72F-4DA4-A36D-55DCF146E9D6

Device Start End Sectors Size Type
/dev/sdd1 2048 999423 997376 487M BIOS boot
/dev/sdd2 999424 6858751 5859328 2.8G Linux RAID
/dev/sdd3 6858752 11721043967 11714185216 5.5T Linux RAID



Edited 2 time(s). Last edit at 07/12/2017 04:39PM by Fotex.
Re: Cant resize Raid 5 bigger than 16TB (solved)
July 14, 2017 07:04AM
well done!

a problem reported and a solution posted. Thankyou
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