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ReadyNAS Pro 6 - Volume scan failed to run properly
Hi -- Long time ReadyNAS user with very few problems to report. Just ran into one, sadly. I have a ReadyNAS Pro Business Edition [X-RAID2] with 6 disks running RAIDiator 4.2.28. FrontView rep...
A follow-up : I did indeed need support, but they were able to restore the volume with 5 good disks out of the six. They had to escalate to level 3 and remote in, but were able to get everything working again. The NAS was well past warranty, but the $75 per-incident support was money well spent.
And for the record, Netgear support was stellar. Every person I spoke to was competent, knowledgeable and polite. They called back when they said they would and didn't miss a beat, regardless of the handoff between four different people (or more, for all I know). Great job, ReadyNAS Support Team!
As you likely realize now, when you reseated drive 1 the NAS treated it as a drive replacement, and started rebuilding the array. During the rebuild period, you don't have RAID redundancy. Since you pulled drive 4 before the rebuild finished, you lost the volume.
I think you'll need support on this.
A follow-up : I did indeed need support, but they were able to restore the volume with 5 good disks out of the six. They had to escalate to level 3 and remote in, but were able to get everything working again. The NAS was well past warranty, but the $75 per-incident support was money well spent.
And for the record, Netgear support was stellar. Every person I spoke to was competent, knowledgeable and polite. They called back when they said they would and didn't miss a beat, regardless of the handoff between four different people (or more, for all I know). Great job, ReadyNAS Support Team!
We have this same problem with our Pro 6 but we NEVER pulled a drive while the array was rebuilding.
Here's the chronology of events:
1) drive 5 reported errors and eventually died altogether
2) drive 6 started reporting errors but wasn't dead when we pulled 5 and replaced it
3) the array started rebuilding but eventually failed with an error and drive 6 was marked dead and noticed 5 was marked as a hot spare and the volume went into read only life support mode (very puzzling as 4 drives are plenty for at least RAID5 and we're using FLEX RAID2 or something to it doesn't make sense)
4) we don't have another drive yet so we reseated 5 and booted back up and it began to rebuild and we were able to work again for about 3 hours, drive 6 was just marked dead
5) the rebuild failed again and yet again the unit went into life support mode with 5 as a hot spare so we shut down and this time reseated both 5 and 6 and booted back up
6) the unit failed a volume check now (and has ever since) and again put the volume into life support mode with 5 as a hot spare
7) we shut down and pulled drive 6 and reseated 5 and booted back up and had the same problem
8) we shut down again and reseated 5 and put 6 back in and booted back up and now the volume isn't being recognized at all (and hasn't been since)
We still have the old failed drive 5. I'm going to try to put that back in to see if that makes a damn bit of difference but am not hopeful. The total data footprint here is laughable. It's like 500GB TOPS and we have 6 2TB drives in this sucker.
So we NEVER pulled a drive while a rebuild was happening ever. Now the unit is totally down and tech support is totally pessimistic of being able to help because 2 drives are failed. We now need level 3 support at an additional $200 (and we already added a support contract for ~$300 to get back in the graces of tech support help) for a "maybe but not likely able to help". They suggested we call the number when we made the decision to go forward with level 3 support and that the tech helping us was going home for the weekend and when I called, the automated number hangs up when we tell it we're calling about a ReadyNAS storage product and it says to file a support ticket online. SO we have NO HELP THIS ENTIRE WEEKEND and this is the repository of all data for 2 companies. We are dead in the water but do have backups that we're looking into now, but does anyone have any suggestion on how to move forward? If this were a regular server I was maintaining, Linux or Windows with a RAID 6 array with failed drives I'd be doing some Linux scripting with dd and attempting to rebuild the data given the amount we need is SO SMALL ANY 1 DRIVE SHOULD CONTAIN A COMPLETE FRIGGING COPY WITH OVER 70% FREE SPACE!
SarahS3074 wrote:
the array started rebuilding but eventually failed with an error and drive 6 was marked dead and noticed 5 was marked as a hot spare and the volume went into read only life support mode (very puzzling as 4 drives are plenty for at least RAID5 and we're using FLEX RAID2 or something to it doesn't make sense)
So you had xraid with single redundancy - which is the same as RAID-5 in your case. You pulled a drive, and immediately lost the redundancy as a result. Then you installed a new drive, and the resync started.
So far, so good. But now you had a second drive failure during the resync. The resync hadn't completed, so redundancy hadn't been restored. So the second failure destroyed the array.
SarahS3074 wrote:
Here's the chronology of events: If this were a regular server I was maintaining, Linux or Windows with a RAID 6 array with failed drives I'd be doing some Linux scripting with dd and attempting to rebuild the data given the amount we need is SO SMALL ANY 1 DRIVE SHOULD CONTAIN A COMPLETE FRIGGING COPY WITH OVER 70% FREE SPACE!
Well, RAID doesn't work that way. The data is spread across all the drives, including the two that failed. Data recovery basically does try to recover the data from the existing drives, and put the pieces back together. As you say it is labor intensive.
...this is the repository of all data for 2 companies. We are dead in the water but do have backups that we're looking into now, but does anyone have any suggestion on how to move forward?
If you have full backups, then the fastest way back is to do a factory reset with the remaining 4 healthy drives in place, and then reconfigure the NAS and restore the data from backup.
If there is data that hasn't been backed up that is worth the expensive of recoverying, you could get two new 2TB drives. Remove all the existing drives, marking them by slot (and keeping the original failed drive).
Then put in the two 2TB drives, do the factory reset, and restore the backup data. That keeps the option of data recovery open.
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