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Maintenance needed before horizontal expansion of Flex-raid-1
I plan to upgrade my disks in NAD RND314 where I have two disk in FlexRAID-1 and one disk as JBOD. Run the latest firmeware. My idea is to just for safety right now incrase one 4TB to 8TB disk i...
janpeter1 wrote:
Sound good. Just a last question, I guess. Since I have one slot (out of 4) free I thought I could mount it there first and perhaps make some check, before I use it to replace one of the RAID-disks. Is that a reasonable idea? Perhaps make disk test of this new disk?
Personally I always test my disks in a Windows PC using vendor tools (Lifeguard for Western Digital; Seatools for Seagate). I run the long non-destructive test, and follow that up with a full erase / write zeros test. I have had some disks that pass one of those tests, but not the other - and I have sometimes found failures with just-purchased disks.
The NAS will do the short SMART self-test before it adds the disk to your volume. If you can't test the disk in a PC, then you could insert the disk the 4th slot, create a volume on it, and then run a disk test on that volume. Then destroy the volume, format the disk, and remove it. After that, hot-swap with the disk you want to replace. (Note that if you were running XRAID you couldn't do this).
FWIW, I suggest you reconsider your use of FlexRAID. You can make a full backup, and switch to XRAID (reconfiguring the NAS and restoring the data from backup). You'd have the same amount of storage as you have now - just on one volume. Expansion in the future would be a bit simpler.
janpeter1 wrote:
Is it good to let the system rest a few hours?
Definitely not. Let it run to completion.
janpeter1 wrote: I have followd the detailed instruction by StephenB on page 13. So far everything goes as expected. I am now re-syncing and down 8 % in 6 hours. The original disk is 4 TB and it had about 3.3 TB data.
Resync is resyncing the full 4 TB - mirroring every sector of the remaining 4 TB disk to the replacement. It doesn't matter how full the disk is - unused sectors are also mirrored.
janpeter1 wrote:
Looking at performance heat looks ok 51 C for the new 8TB and 48C fo the old 4 TB and 41C for the almost in-active disk 3 that is also 4 TB.
You can set the profile to "cool" - I sometimes do that when syncing (setting it back to balanced when done). Temps vary a lot in different disk models.
Thanks! Put it on cool and temperature dropped a few degrees. And yes you here the fan a bit. Before only in quiet mode, so a difference. I let it just go on now. Thanks again.
Mission completed! No problems. It all went faster when I increased the coolling and the whole sync of 4 TB to the new 8 TB disk took about 24 hours.
I understood that problems with a new disk turns up usually immediately or very early. I just wonder if my old former 4TB RAID-1 disk if there is any use to keep it for a while as is? I have sveral USB-backups so that is no real problem. Later I plan to erase this old 4TB disk and perhaps keep is a cold or hot spare.
The old RAID1 drive can be used to boot the NAS as it was immediately prior to it's removal if it was removed prior to any horizontal expansion. If it was after, it's not really going to help you with anything.
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