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Forum Discussion
Volume not expanded after adding higher capacity disks
Hi, I have a ReadyNAS NV, and I've been running X RAID with 4 x 1 TB Disks. Recently, I've been replacing the disks 1 by 1 with 2 TB disks. After last night, I finally now have 4 x 2 TB Disks i...
Reboot seemed to have done something. I now see in the Volume page of Frontview showing me the right amount of disk space (~2TB) are allocated on each disk, but the overall capacity of the NAS hasn't changed. It is still stuck at 3TB, not 6 TB as I was expecting.
I then saw this error in the log: "Disk capacity expansion error. resize2fs". After googling this for a while, this seems to be a known problem with upgrading to 2 TB drives in ReadyNAS: https://community.netgear.com/t5/Using-your-ReadyNAS/Disk-capacity-expansion-error-resize2fs-Readynas-NV-F/td-p/653186
Am I now stuck with no option but to initialize my ReadyNAS from scratch? What a painful process trying to move from 4x1 TB to 4x2 TB. Had I known this, I would have reconsidered. I now have spent over $300 on new disk drives, and still not getting the capacity that I wanted. I've always been a ReadyNAD fan, but this is got to be the biggest disappointment with this this product.
Let's first confirm that this is the issue -
Please download the logs from FrontView > Status > Logs > Download All Logs.
Look at system.log and search for "block size". Is it set to 4096?
Though I get the disappointment, the block size issue was a time bomb in the original 3.x NAS firmware (years before 2 TB drives were on the market).
In volume.log, I see this line:
Block size: 4096
and in system.log, I see this line:
system.log:Aug 30 16:58:53 readynas kernel: RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize
and I'm running firmware RAIDiator 4.1.14 [1.00a043]
So, what's my option now? Thanks very much for looking into this.
The block size of 4096 confirms that the volume was created a very long time ago. Newer volumes would have been created with block sizes of 16384. That's why it won't expand.
It's possible that mdgm can give some manual instructions with ssh - not sure if that can be done (certainly I don't know how to this manually myself).
The other option is the factory reset/rebuild the NAS.
As I said before, this is all due to the way the very old volume was created (back in the RAIDiator 3.0.x days).
Do you have a backup?
Manual expansion to about 5TB may be possible, however this is a bit less than what you would get by backing up your data, doing a factory default (wipes all data, settings, everything) and restoring your data from backup.
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