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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.
Actually making a disk test I found quite obvioius to do and I started on my lonely JBOD disk first.
More than a year since I did that, do not remeber. This disk is not as old as the RAID-par.
But it takes very long time to do this test, right now more than 5 hours for a single 4 TB disk.
Is this really ok?
How do I check the SMART status?
Also I reasoned like you, first expand the external USB HD and then go to the NAS-disks. Do not worry!
On the System/Performance page, hover over the green dot beside the drive type and a pop-up will show you the SMART data. If you click in the pop-up, it'll let you scroll in it.
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