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First Disk Missing on ReadyNAS 204 After Boot
I've been running a ReadyNAS 204 for years without any issues. I usually keep it powered off until I need to access it. The last time I powered it on was back in June, and everything was working fine.
However, when I powered it on today, I noticed that the first disk/volume is missing. The other two disks seem to be working as expected. How can I restore my first disk?
Here’s my setup: Firmware 6.10.9
- Disk 1: /dev/sda
- Volume Name: data
- Type: JBOD
- Disk 2: /dev/sdb
- Volume Name: data8002
- Type: JBOD
- Disk 3: /dev/sdc
- Volume Name: data8003
- Type: JBOD
What I’ve tried so far:
- I removed Disk 1 and reinserted it, but nothing changed except /dev/sda now shows up as /dev/sdd.
- All SMART readings are normal, with no errors reported.
Any ideas on how to recover my first disk?
Thanks in advance for your help! Please!
5 Replies
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ssssss wrote:What I’ve tried so far:
- I removed Disk 1 and reinserted it, but nothing changed except /dev/sda now shows up as /dev/sdd.
FWIW, that was a bad idea.
ssssss wrote:- All SMART readings are normal, with no errors reported.
SMART isn't telling you the whole story.
There's a flood of disk i/o errors in dmesg.log, systemd-journal.log, and kernel.log. Unfortunately the disk appears to have failed.
FWIW, it is best not to post log zip files publicly - there is some information leakage when you do that.
StephenB wrote:SMART isn't telling you the whole story.
There's a flood of disk i/o errors in dmesg.log, systemd-journal.log, and kernel.log. Unfortunately the disk appears to have failed.
It may be telling you everything about the drive, the errors logged could be the fault of the NAS, not the drive.
Is the drive showing up in the GUI as present, just not containing a volume, or is the drive not showing at all?
When you removed and replaced the drive, did you return it to the same slot, or the empty one? Did you do it with power off or power on? If it was with power on, have you since re-booted?
Sandshark wrote:
StephenB wrote:SMART isn't telling you the whole story.
There's a flood of disk i/o errors in dmesg.log, systemd-journal.log, and kernel.log. Unfortunately the disk appears to have failed.
It may be telling you everything about the drive, the errors logged could be the fault of the NAS, not the drive.
FWIW, it is flooded with UNCs, not ATA errors,.
I've seen UNCs in my own logs occasionally that didn't show up as SMART errors. When I have seen this happen, it was definitely the drive, and not the NAS. I've also seen similar reports with other brands (particularly Synology).
StephenB Sandshark Really appreciate for your reply.
I moved my hard drive from Slot 1 to Slot 2, but the result is the same—volume not found.
Attached are the two screenshots you requested. Could `mdadm` help restore or rebuild the volume in this situation? Should I try external enclosure to help recover the disk?
Thanks again!
ssssss wrote:
I moved my hard drive from Slot 1 to Slot 2, but the result is the same—volume not found.
Could `mdadm` help restore or rebuild the volume in this situation?
No. mdadm is the linux software raid software. You have jbod volumes with no RAID redundancy, so mdadm cannot help you.
The UNCs suggest the disk has failed. You can confirm that by connecting the drive to a Windows PC and using vendor tools to test it (seatools for Seagate, dashboard for Western Digital)
You can try to clone the drive using cloning software that does sector by sector copying. That might allow you to get back some of the data. But that assumes that enough of the data and metadata can be copied to allow recovery software to get some of the files
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