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Forum Discussion
Upgrading 1st disk on RN214 (pure JBOD config) (English)
(Originally posted by mistake in Chinese forum, Sorry) Hi, I have a RN214 which I populated with whatever disks I had lying around in a fully JBOD config (1TB, 2TB, 4TB, 3TB respectively) when I bou...
Marc_V wrote:
You will be doing this procedure on Flex-RAID.
1. Do full backup on Disk 1 and Disk 2.
2. Replace Disk 1 with new 2TB
3. Destroy Disk 2 JBOD Volume
4. Create new volume RAID 1 using Disk 1 and Disk 2
5. Transfer Backups on new RAID 1 volume
You do have to destroy Disk 1 volume, then create a new volume on the 2 TB disk.
There is another option though.
- Destroy Disk 2's volume
- Add Disk 2 to the Disk 1 volume for redundancy (making it RAID-1, but wasting 1 TB of space)
- Hotswap Disk 1 with the new 2 TB disk. The volume should expand to 2 TB at this point.
- Transfer Backup of original disk 2 volume on the new RAID-1
This avoids the need to restore the home folders and reinstall your apps.
Hi,
Thanks for the responses...
Re: the 2nd solution - please confirm if my understanding is correct? By default, the (FlexRAID) RAID1 would need to be recreated destructively on both disk1 and disk2 for the larger 2GB size OR actually, the RAID 1 expansion from 1G to 2G is actually a smooth no data loss operation?
Should I remove the other 2 HDDs before doing the above?
t_m wrote:
Should I remove the other 2 HDDs before doing the above?
No.
t_m wrote:
the (FlexRAID) RAID1 would need to be recreated destructively on both disk1 and disk2 for the larger 2TB size OR actually, the RAID 1 expansion from 1T to 2T is actually a smooth no data loss operation?
You'd need to destroy the volume on disk 2, but not the volume on disk 1. So there should be no data loss on the disk 1 volume.
You convert to RAID-1 (2x1TB) with the 1 TB disk in place. Hotswapping the 1 TB disk will first resync the 2x1TB RAID group, and (per the manual) will automatically expand to 2x2TB RAID-1.
There are yet other options, though there may be a bit more risk (which I will describe later).
The first step is always backup. By that, I mean on another device.
If you EXPORT drive 1, the home share location (but not the data in them) should migrate to drive 2. Unfortunately, as with their original creation, the actual shares won't be creted until the user again logs on. Once you've done that, you can replace drive 1 with a larger drive and add it as redundancy to Drive 2. Then, restore the content from Drive 1. The risk here is that I have seen a case where the home folder location wasn't properly migrated (though I was doing a lot of experiments, and something I did earlier may have triggered it) and that i do not know absolutely that the home folder location will not migrate to another drive (if that even matters to you). Note thast, if needed, the EXPORTed drive can be re-IMPORTed to the NAS (though you'd need to make room for it), but the data in the home folders on it will only be accessible via SSH.
You could also EXPORT drive 3 and/or 4, put the new drive there, and add redundancy to the volume on Drive 2 with Drive 1 still in place, then EXPORT drive 1 later. If done when no other volumes are present, the migration of the home folder location is more assured. Once all that was done, re-IMPORT drives 3 and 4. Note that an IMPORT is done simply by powering down the NAS, inserting the drive, and powering back up.
If you have apps you are using, then there is more to be considered, and StephenB 's recommendation is the better direction, though you could EXPORT the volume on Drive 2 instead of destroying it, and replce it with the new 2TB for adding redundancy to the Drive 1 volume. That also leaves you the option of re-importing it (after making room for it) if needed, until you use it to replace Drive 1 and expand the volume.
Hi,
That's a great suggestion - I didn't even think along those lines. Great stuff! Thanks!
Drives are backed up - thats not a problem. I'll be refreshing all the backups just before I start work in every case. I'm paranoid on this - seen too many disasters without backups.
Export talks about 'to another ReadyNAS system' - does it work on different JBODs in the same box? Or can it work only to an external external (USB based HDD mount)? That is not clear from the documentation
Assuming it works on JBODs in the same box - the sequence I need to follow is :
1) Replace disk2 by a (blank) new_disk_1
2) EXPORT disk1 to new_disk_1
3) Replace disk1 by new_disk_1 as JBOD //new_disk_1 now takes over the functions of disk1
4) Reinsert disk2 as JBOD
5) Move everything on disk2 to new_disk_1 //new_disk_1 now has everything on it and disk2 is empty.
6) Create Xraid combining new_disk_1 and disk2
7) Wait for sync to complete
Did I miss something?
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