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Forum Discussion
Duo v1 hangs during sync and losses network
Hi, I have a ReadyNas Duo v1 with two 2 TB disks in RAID configuration (don't remember which), The 2TB disk space is almost full, ~95%. Maximum memory. I also have a UPS connected to the NA...
Your OS partition is fine. You must be using xraid, because linux reader wouldn't see the files if you were using flexraid.
I think you have a corrupt file system (and that the lockup is in fsck, not raid resync). Though I can't rule out a failing disk.
You could shut down, and insert disk 2 alone (in the second slot) and see if you get the same behavior. My guess is that you will, but it is worth a try.
It is also worth testing the disks with vendor diags in a PC (seatools for seagate, lifeguard for western digital).
Assuming the lockup happens with only disk 2 installed, the options are to
(a) attempt to repair the file system yourself
(b) contract with Netgear for data recovery
(c) accept the data loss - do a factory reset on the NAS, reconfigure it, and restore the data from a backup.
No matter what option you pick, create a backup on your PC first - using linux reader (copying the files linux reader sees to a USB disk or an NTFS internal disk).
Tried to boot up with only disk 2 plugged in.
The system came up after finishing the file checks, i.e. no hanging during fsck phase as with both disks or only disk 1 in.
So problem seems to be related to disk 1.
FrontView access, shares etc came up.
Did a controlled shutdown since I have to go away for a while.
Will try to backup to external disks from NAS during later tonight.
Monteverde wrote:
Will try to backup to external disks from NAS during later tonight.
Great. That simplifies the next steps (and you should have all your data).
The fastest way to back up your data is to attach the external disk to your PC and back up over a wired ethernet network. That is a lot faster than attaching the USB drives directly to the NAS. I like to use robocopy or teracopy, and not windows drag and drop. Teracopy has a verify option, which is probably worth using (though it will take longer).
Once that is done, install the replacement disk for disk 1. I like to test it with vendor diags in a PC first. Don't format it- just hot-insert it into the NAS unformatted. Keep in mind that your duo has a size limit of 2 TB or less. I recommend WDC Red drives (wd20efrx or wd10efrx). If you prefer seagate, use a drive from their VN line (not a DM drive).
The compatibility list for the duo is stale, so it isn't very useful anymore.
Obviously one lesson here is that RAID isn't enough to keep your data safe, so you should set yourself a regular backup schedule once everything is running again.
Hi StephenB,
Thanks a lot for the support!
Everything is now up and operational, a new disk1 (WD Red 2T). Backup schedule in place etc. I will also replace disk2 with a fresh WD Red just in case.
I would be very interessted in knowing the root cause to my problem. There are no traces in any of the logs that give any clues. Why is the NAS so sensible to problems during the checking of the filesystem? It doesn't seem like a robust system if problem with one disk makes the whole system freeze!
Since I have grown out of the current system I will also start looking for a replacement NAS.
Thanks again :)
You could PM mdgm, and ask if he is willing to go through your logs. His signature includes the procedure to get them to Netgear (which is emailing them).
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