Volume not expanded after adding higher capacity disks

Question

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 in X RAID configuration. However, in Frontview, under the Volume Settings, I noticed that ReadyNAS is not taking advantage of the new capacity, and it's still showing that I have capacity of about 3 TB. I thought ReadyNAS would be smart enough to detect that I now have 4 x 2 TB disks, then the total volume should be expanded to 6 TB instead of 3 TB.

I remembered I've done this in the past while upgrading from smaller capacity disks to the 1 TB disks and it worked. What do I need to do to make get ReadyNAS to recognize the extra capcaity?

Thanks.

StephenB · Answer

Let's first confirm that this is the issue -&nbsp;
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Please download the logs from&nbsp;FrontView &gt; Status &gt; Logs &gt; Download All Logs.
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Look at system.log and search for "block size". &nbsp;Is it set to 4096?
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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). &nbsp;

StephenB · Answer

If the volume looks synced, try rebooting it.
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What firmware are you running?

readynas_user99 · Answer

Reboot seemed to have done something. &nbsp; I now see in the Volume page of Frontview showing me the right amount of disk space (~2TB) are&nbsp;allocated on each disk, &nbsp;but the overall capacity of the NAS hasn't changed. &nbsp; It is still stuck at 3TB, not 6 TB as I was expecting.&nbsp;I then saw this error in the log: "Disk capacity expansion error. resize2fs". &nbsp; After googling this for a while, this seems to be a known problem with upgrading to 2 TB drives in ReadyNAS: &nbsp;https://community.netgear.com/t5/Using-your-ReadyNAS/Disk-capacity-expansion-error-resize2fs-Readynas-NV-F/td-p/653186 &nbsp;&nbsp;&nbsp;Am I now stuck with no option but to initialize my ReadyNAS from scratch? &nbsp; What a painful process trying to move from 4x1 TB to 4x2 TB. &nbsp; Had I known this, I would have reconsidered. &nbsp; I now have spent over $300 on new disk drives, and still not getting the capacity that I wanted. &nbsp; &nbsp;I've always been a ReadyNAD fan, but this is got to be the biggest disappointment with this this product.

readynas_user99 · Answer

In volume.log, I see this line: &nbsp;Block size: 4096&nbsp;and in system.log, I see this line: &nbsp;system.log:Aug 30 16:58:53 readynas kernel: RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize&nbsp;and I'm running firmware&nbsp;RAIDiator 4.1.14 [1.00a043]&nbsp;&nbsp;So, what's my option now? &nbsp; Thanks very much for looking into this.

StephenB · Answer

The block size of 4096 confirms that the volume was created a very long time ago. &nbsp;Newer volumes would have been created with block sizes of 16384. &nbsp;That's why it won't expand.
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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).
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The other option is the factory reset/rebuild the NAS.
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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).
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Volume not expanded after adding higher capacity disks

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