Cannot expand volume when adding new disk to RAID5

[nimbus]

Hi,

System Details:
QNAP TS-853 Pro (8GB ram)
Firmware: 4.2.0 (2016/01/19)
5x WD RED 3TB (RAID5 > 1 Storage Pool > 1 Volume)

Until recently I was running with 4x 3TB WD RED drives. I recently purchased an additional drive (exactly the same: 3TB WD RED). I installed the drive. I added it to the RAID5 set and expanded the capacity of the storage pool. It went from ~8TB to ~10TB.

In QTS under Storage Manager > Storage Space I can see my storage pool with capacity of 10.88TB. Expanding that node reveals my one volume. This volume is listed with a capacity of 8.08TB. When I click 'Manage' for that volume it shows details for that volume, however the 'Expand Volume' button is greyed out.

Screen Shot 2016-01-30 at 13.54.17.png

How do I allocate the new space available to the volume?

Cheers for any help!

[MrVideo]

With the potential of using 8 drives in your NAS, you should be using RAID6. The potential for having two drives to go bad is too risky for RAID5.

Run the following to resize the RAID:

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device=md1

/etc/init.d/services.sh stop
/etc/init.d/opentftp.sh stop
/etc/init.d/Qthttpd.sh stop
/etc/init.d/rsnap.sh stop

umount /dev/$device

e2fsck -f -v -C 0 /dev/$device

tune2fs -O ^has_journal /dev/$device

mdadm --grow /dev/$device --size max
resize2fs -p /dev/$device

e2fsck -f -v -C 0 /dev/$device

tune2fs -j /dev/$device

reboot

Change md1 to match your configuration. If you don't know what it is, do the following to see what it is:

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cat /proc/mdstat

Do a group of commands at a time. A group is separated by a blank line.

[nimbus]

Hey thanks for the answer. I will give it a shot and also look to migrate to RAID6 when I get more drives.

[nimbus]

By the way - why can't I do this in the web gui??

[MrVideo]

By the way - why can't I do this in the web gui??

Good question. I have no idea why the Expand Volume button is greyed out.

[nimbus]

I am now trying to do this again with another new disk... (I have migrated to RAID6)

Following your steps above I get as:

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e2fsck -f -v -C 0 /dev/$device

but receive an error:

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/dev/md1 is in use.
e2fsck: Cannot continue, aborting.

I am also getting an error (not found) when running

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/etc/init.d/rsnap.sh stop

I am now running firmware QTS 4.3.3.0361

Any suggestions?

[Don]

Why are you not using the GUI?

[nimbus]

The Expand Volume option is still greyed out for me

[Don]

It looks like you need to do a file system check first.

[nimbus]

That's what

Code: Select all

e2fsck -f -v -C 0 /dev/$device

does, isn't it?
That's the part that's not running.

[Don]

Is it not working from the GUI?

[nimbus]

Ran the following from terminal. Fixed a bunch of issues.

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e2fsck -f -v -C 0 /dev/mapper/cachedev1

I also updated to QTS 4.3.3.0378 which just happened to become available.

One of these actions resolved the problem and I have been able to click on Expand Volume in the GUI.