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ReadyNAS 636 Upgrade Process
We have several/many NAS units which need to have their storage updated. Existing storage volumes are currently defined as RAID 1 volumes (mirrored) with bit rot protection. The volumes are in the ...
Digital999 wrote:
After both disks that make up a RAID 1 X-Raid volume have been 'synchronized/rebuilt' will the larger capacity just be available or is there some other command that must be entered or the system restarted or ??
The capacity will be available after the second disk completes its resync.
The first resync will be fairly quick (just 2 TB - 4 TB of disk space is mirrored).
The second resync has two phases. First it resyncs the 2 TB - 4 TB again. Then it syncs the remaining 8-10 TB.
Note the sync (mirroring) time doesn't depend on the free space. The entire disk is mirrored.
Digital999 wrote:
We have several/many NAS units which need to have their storage updated.
Existing storage volumes are currently defined as RAID 1 volumes (mirrored) with bit rot protection.
The volumes are in the 2 to 4 TB range and will be replaced by 12 TB drives.
You can just vertically expand the existing volumes. See pages 40-41 here:
Although the manual doesn't say, I always recommend hot-swapping the disks (NAS running). As the manual does say, be sure to wait for the resync to complete before hot-swapping the second disk.
Netgear (and I) do recommend updating your backups first, as if something goes wrong you can lose data.
This seems too easy -- better than what I expected.
After both disks that make up a RAID 1 X-Raid volume have been 'synchronized/rebuilt' will the larger capacity just be available or is there some other command that must be entered or the system restarted or ??
Digital999 wrote:
After both disks that make up a RAID 1 X-Raid volume have been 'synchronized/rebuilt' will the larger capacity just be available or is there some other command that must be entered or the system restarted or ??
The capacity will be available after the second disk completes its resync.
The first resync will be fairly quick (just 2 TB - 4 TB of disk space is mirrored).
The second resync has two phases. First it resyncs the 2 TB - 4 TB again. Then it syncs the remaining 8-10 TB.
Note the sync (mirroring) time doesn't depend on the free space. The entire disk is mirrored.
Thank you.
Saved me lots of issues and time. Over 50 sites to upgrade and this guidance will certainly help.
This is the "magic" of XRAID. It's actually possible to do it manually using the MDADM and BTRFS tools that XRAID also uses. But XRAID will do it all for you. There are a few limitations on how you can expand, some of which seem to be simply because the logic to do the "illegal" ones is just too complicated and likely so rare as to make them not worthwhile implementing. But your case is a very simple and common one that's fully supported.
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