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Forum Discussion
ReadyNAS ultra 4 disk failed while adding new disk.
Hi, I have a readynas ultra 4 which contained 4 2TB disks in the netgear raid configuration, XRAID. Since it was full I today bought a new 4TB disk with the plan to swap all disks to 4TB inorder to...
Just putting the old drive back won't work, as it is now out of sync with the others. Doing so could make things worse, so I wanted to answer that part of your question right away.
You are in a data recovery situation. If the second failed drive can still be read, making a clone of it and replacing it with the clone can sometimes help. There are some other options, paid Netgear support being one of them, fo data recovery, but I'm no expert on them.
Hi, thanks for the feedback, appreciate it.
After checking my backup, it's not to bad, a little work might be lost pending what happens.
So, I got brave and rebooted the unit and now disk 2 is ok and looks sane with smart etc.
However, the RAID sync starts after reboot and after about 15 minutes it stops and then I cant access the drive after that.
Retried it and happens about the same time after reboot.
Disk 2 fails and disk 4 is trying to rebuild, it needs 4-5 hours but stops at about 4% when RAID sync stops.
Until then I can retrive som test files just fine, after that the unit has 0 byte of storage.
I pulled disk 4 out and then it seems fine (after reboot), I guess since I didn't trigger RAID sync. But with warnings since there is (of course!) no more redundancy.
I'm on latest official RAIDiator 4 for this unit.
So I guess I'll try to backup whats left on it to a seperate drive with just 3 drives in it...and then clear it and start from scratch...
Is there a best strategy for this? I guess I will hit the problem (at disk 2) at some point....then I'll see whats missing I guess.
Or is there an obvious known fix that just solves my problem ?
I'd try to pull the files that aren't backed up from the degraded array. Try not to pull too much, and hopefully disk 2 won't fail on you before you get what you need.
Then do a factory reset with all the new disks in place, reconfigure the NAS, and restore the data from backup.
BTW, while you are at it, you could also convert your NAS to run OS 6.
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