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Forum Discussion
Solved
Unable to horizontally expand Raid-5
firmware 6.5.0
readynas 2120
I currently had 2 volumes: 1) is a 3 disk---2TB set up as a Raid 5, which gave me 4TB of storage. The 2nd volume was 1 disk--4TB----JBOD. I have now copied what I needed from the 4TB drive onto the Raid 5 volume. I removed the 4TB drive, I did not DESTROY it before removing, I wanted to keep it intact for the moment. Next I installed an additional 2TB drive into bay 4, my goal is to add this disk to the existing 3 disk RAID 5, which should increase my storage to 6TB. I can't seem to add the 4 disk to the RAID 5 volume.
The 3 disk raid 5 is currently syncing, is that why I can't add the additional 4th disk?
When in Flex-Raid mode, I can click on bay 4 in the GUI and I can choose "New Volume" or "Format". On the Volume info there is an "add parity" button, but it is greyed out.
When in X-Raid mode, I can click on bay 4 in the GUI and I can choose "Format" only. And on the Volume info there NO "add parity" button.
I do not want to add another disk for protection. I want increase my storage capacity and stay with Raid 5, which should give me 6TB of total storage.
Do I just need to wait till syncing is completed?
- "Destroying" the volume on the 4TB doesn't matter. If you want, you can reinsert it in place if the unused 2TB, but it's not going to make any difference here.
You can't expand a syncing RAID. You just have to wait for the sync to complete.
Leave the blank 2TB HDD in the chassis, turn on X-RAID (you don't need Flex-RAID). When the resync is finished, it will pick-up the fourth 2TB HDD and will expand your RAID5.
7 Replies
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Wait for the resync to be completed.
I think it would have been better to destroy the jbod volume.
- "Destroying" the volume on the 4TB doesn't matter. If you want, you can reinsert it in place if the unused 2TB, but it's not going to make any difference here.
You can't expand a syncing RAID. You just have to wait for the sync to complete.
Leave the blank 2TB HDD in the chassis, turn on X-RAID (you don't need Flex-RAID). When the resync is finished, it will pick-up the fourth 2TB HDD and will expand your RAID5.
jak0lantash wrote:
"Destroying" the volume on the 4TB doesn't matter. If you want, you can reinsert it in place if the unused 2TB, but it's not going to make any difference here.Sometimes you do get those "inactive volumes", and they are not always easy to deal with. As a user, I can't predict when they will show up. So my practice is to destroy the volume before I remove the drives in it.
I just had to wait till sync was completed and at that point once I switched to X-raid, the NAS then grabbed the open/free 2TB drive in bay 4 and joined that to the array, which lead to another sync......10 hours later all done.
- Inactive volumes show up when there is HDD with a partition on a HDD that the ReadyNAS can't put in any mountable RAID array.
Destroying a volume prior to remove its HDD(s) is probably good practice as it allows to clean any trace of it in the configuration. But not doing so is not a problem. Well, I have never seen a situation where it caused any.
So you're right, it's better to do it, but it's most likely ok not to.
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