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Forum Discussion
ReadyNAS104 no data after hotswap
Hi,
I had the Volume: Volume data health changed from Degraded to Dead.
I hotswapped the Volume 1 today, with an 8TB drive and now the other 3 drives are showing red, and the new drive is black. (other drives are v2 - 2TB and V3&4 - 4TB) [v1 was 4 TB]
It is like all the drives are now showing as new, I cannot see any data. and now the warning is Remove inactive volumes #2,3,4.
I really hope this doesn't mean all the data is lost.
If anyone can help it would be appreciated.
Regards
Craig
13 Replies
Is XRAID enabled?
You have still not given a full description of what you saw and did. Here is what I think you are describing, please concur or correct:
- You saw that one drive had failed. At this point, the display, UI, and RAIDar were saying the volume was degraded.
- You hot-swapped drive 1, the drive you thought was bad
- No drive activity was noted on drive 1 and the volume now went from degraded to dead.
- You hot-swapped again because you thought maybe you swapped the wrong drive, putting the "wrong" drive back in and swapping the "correct" one all with power remaining on. Which drive you swapped this time, I have no idea.
- Again, nothing happened.
If you did, in fact, swap the wrong drive and swap again with power on all the time, then that would explain what you have. Once you were down to only two working drives from the original set, the volume is dead. And the solution should be easy unless you have since done something you shouldn't (like delete the volume via the OS). Power down, put all the original drives back in, and re-boot. You should again have a degraded but accessible volume. Then use the UI to make sure you hot-swap the correct drive, and do so. If nothing happens again, then select the new drive and FORMAT it.
Even if you initially swapped the right one, no activity at that point could mean the drive is bad or was pre-formatted (perhaps by the vendor) and needed to first be formatted by the NAS (which you must do manually from the UI). At that point, the volume would have still been degraded, not dead. Pulling a second drive would then kill the volume, but not permanently since it doesn't actually do anything with an incomplete volume. So, again, going back to all the original drives with power off should get you back to where you can try again when you re-boot so long as you did not do anything else that would have killed it.
The main thing different in the two scenarios is where the volume went dead -- after the first or second swap. If you're unsure, the log should tell you.
Note that during the re-boot there will be a slight delay while the NAS re-synchronizes the OS and swap partition RAIDs. But they are small and it goes quickly.
Hi,
I have just turned the unit back on with all 4 original drives in place.
This is what I see.
I don't think XRAID was enabled. It was just RAID5
XRAID was enabled (and still is). The green stripe on the XRAID control tells us that.
This is what I see.
Download the full log zip file from the logs page.
If you can't interpret what it says, you can put it into cloud storage and send me a link via private message (PM). Make sure the permissions are set so anyone with the link can download. You send a PM using the envelope icon in the upper right of the forum page.
Best not to post the link publically, as there is some privacy leakage when you do that.
Hi, the drive was originally degraded. but now it looks dead
I hotswapped the Volume 1 today
You are using drive and volume interchangably - which creates some confusion.
"Drives" are the physical drives. You hotswapped the first drive.
"Volume" is the file system that spans all your drives. The volume is what was degraded (and is now dead/inactive).
I don't think XRAID was enabled. It was just RAID5.
Your explination above was almost exactly what I did. Except I eventally removed drive 3 & 4 as well.
Thanks for your help, I have been out of control busy, but I am running through your recommendations now. to see what will happen.
I think the original drive 1 is now dead. but I will put it back in for the first test.
1. You saw that one drive had failed. At this point, the display, UI, and RAIDar were saying the volume was degraded.
FWIW, I thought the volume was dead at this point, not degraded.
It's quite important to get this part right.
Hi, the drive was originally degraded. but now it looks dead
I had the Volume: Volume data health changed from Degraded to Dead.
Did this happen before you hot-swapped the drive?
Or was it a result of the hot-swap?
now the warning is Remove inactive volumes #2,3,4.
Don't do that.
Did this happen before you hot-swapped the drive? Yes
Or was it a result of the hot-swap? Hot swap
Don't do that. - unfortunately, I did.
Did this happen before you hot-swapped the drive? Yes
Once the volume is dead, it is too late to replace a drive. Still, sometimes data can be recovered (depending on exactly what happened).
Don't do that. - unfortunately, I did.
Then you have lost your data. A data recovery service might be able to get it back.
FWIW, that message is confusing - it is only appropriate if you are wanting to create a new volume.
More information is needed here. Start from the beginning as to what you saw and what you did.
"Degraded" means one of the drives was already dropped from the array -- most likely due to a drive failure -- so you lost redundancy. If your insertion of the new drive (I assume you mean you swapped drive 1, you can't just swap out a volume) was intended to replace that drive, it sounds like you either swapped the wrong one or a second one failed during the re-sync of the new one.
Did the replacement drive have any previous formatting or data? After the swap, did the NAS start to re-sync the new drive or just go straight to "dead"?
The new drive had no formatting.
After the swap nothing happened.
I then though that I removed the wrong drive. So I removed Drive 2 and swapped it with the new drive 1
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