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Aspirant

Apr 21, 2019

ReadyNAS Pro 6 - Disk showing "dead" even though bay is empty

ReadyNAS Pro 6 - Running RAIDiator 4.2.31 - X-RAID2

5 x 3TB - Seagate ST33000650NS - Dual Redundancy

Disks installed in bays 1 thru 5

Whilst running my monthly data scrubbing, disk in Bay 1 died and data scrubbing stopped. Front panel showed "X" for bay1.

I replaced with another ST33000650NS which had passed Seagate drive tests but RNP did not acknowledge and showed drive as "Dead".

I moved the new drive to Bay 6 and system recognized and started a re-sync but still showed a drive in Bay 1 as dead. even though the bay is now empty.

After the re-sync had completed, I received the following:

"RAID sync finished on volume C. The array is still in degraded mode".

I have tried re-installing 4.2.31.

I have tried turning RNP off and leaving unplugged for 2 hours.

Now, front panel shows no disk in Bay 1 but "Health" tab still says "Seagate ST33000650NS 2794 GB" - "Dead".

I doubt that I am really in degraded mode and I have dual back-ups on 2 of the three USB ports. (UPS on third USB.)

All 5 drives have ZERO Rellocated Sector Counts and ZERO ATA Error Counts.

So, I am not concerned about losing data but I would like to clear the error.

Why does it think there is still a drive in the empty bay? I thought the total power down would cause the BIOS to lose it's memory.

24 Replies

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StephenB
Guru - Experienced User
Apr 21, 2019
AndyWheatcroft wrote:

I doubt that I am really in degraded mode

Not sure myself.

Can you download the log zip file, and post mdstat.log and mdconfig.log?
- AndyWheatcroft
  Aspirant
  Apr 21, 2019
  Had to covert files to PDF. Looking at this file, it is obvious that the RNP thinks I only have 4 working disks yet Frontview shows different.
  - StephenB
    Guru - Experienced User
    Apr 22, 2019
    You can just copy/paste text snippets from the logs.
    
    mdstat shows the system is somewhat confused.
    
    md1 and md4 are using all disks (including the missing/dead one)
    
    md0 and md3 are using the missing/dead disk, but not the new one
    
    Only md2 is correct.
    
    This could probably fixed with ssh (or by paid support). Another approach is just do a factory reset, and restore the NAS from backup.