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Forum Discussion
Resync Issue
I have a small problem, I use to have a D-LINK DNS-323, 2 drive bay storage running RAID1 which ran find for me, then I upgraded to a DNS-343, 4 drive bay storage and brought another 2 drives of the same model, configured it as RAID 5 and after the configuration it started rebuilding pointing to drive bay 4 being the fault, I updated the firmware on the drives and checked it for bad sectors etc and it came back as OK, thinking that D-LINKS software raid on it's DNS-343 was flakely, I returned it for credit and brought my self a new ReadyNAS Ultra 4 Plus unit, so I set it up and installed all my 4 drives into it and it configurated RAID X2 and completed fine until a few mintures later it started to Resync pointing to drive 4 being the problem, which was the drive that was causing problems in the D-LINK NAS.
Can someone shed some light on this?
Cheers
Can someone shed some light on this?
Cheers
5 Replies
- What happens normally is that the NAS will build the array using disks 1-3. After that is finished it will start to resync the remaining disk with the array. In your case that would be disk 4. So an initial resync is normal. Now there may be a special case where the disk in question reports some relocated sectors or other stuff that the NAS chokes on. This may trigger another rebuild of the array - as happened to me with one of my disks. Although the vendor tools kept saying the disk was fine the issue was only resolved when replacing the disk with a new one.
So in essence: wait for the resync to finish. Once it has, watch whether resyncing occurs again. If so, replace the drive.
-Stefan - I see, I thought once it builds the array that's it!! and a resync only happens if a disk is failing, I let it do it's resync and let you know what happens after a few hours of the resync completing
cheers - The drives have to be synced sector by sector to setup the RAID which does take some hours. This is so that if one disk fails your data will remain intact.
- Ok, I'll let it resync and see what happens afterwards, if it resync's again I'll replace it with a spare I have and take it from there.
Will post back later in the week
Thanks - Finally have all my data transferred over after resync and noticed this morning it was doing another resync, however I had scheduled a Disk Scrubbing with Auto Parity Fix, would this cause a resync? if so I guess everything is ok now
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