Forum Discussion

Aspirant

Dec 28, 2015

Solved

Data Degraded but Volumes are fine?

Hi there, I've had a ReadyNAS 314 taking care of my Time Machine backups for around 2 years now with no problems. Currently, the ReadyNAS LED is flashing "data ; Degraded" so I had a look ins...

ReadyNAS OS 6 on Legacy models

Using with Mac OSX

mdgm-ntgr
Dec 29, 2015
If you hover your mouse over the disk you should see some stats.

Your logs show that disk 3 (one of your WD20EARS disks) has failed. It has 945 reallocated sectors and a current pending sector count of 695. I would suggest replacing this e.g. with a WD20EFRX.

Your smart_history.log would suggest this disk was failing possibly as far back as April. Certainly by May/June.

Do you have a backup?

mdgm-ntgr

NETGEAR Employee Retired

Dec 29, 2015

Do the SMART stats for your disks look fine?

Can you send in your logs (see the Sending Logs link in my sig)?

getads

Aspirant

Dec 29, 2015

Thanks mdgm,

Just sent you my logs via email.

Not sure what the Smart stats are for the disks? Apart from the yellow 'degraded' alert, there is nothing else in any interface that looks like a problem?

mdgm-ntgr
NETGEAR Employee Retired
Dec 29, 2015
If you hover your mouse over the disk you should see some stats.

Your logs show that disk 3 (one of your WD20EARS disks) has failed. It has 945 reallocated sectors and a current pending sector count of 695. I would suggest replacing this e.g. with a WD20EFRX.

Your smart_history.log would suggest this disk was failing possibly as far back as April. Certainly by May/June.

Do you have a backup?
- getads
  Aspirant
  Dec 29, 2015
  Thanks mdgm,
  
  Sure thing, I can replace this disk. I assume that I can just remove the current disk and replace with a fresh one? Then the RAID configuration should take care of syncing - is that correct?
  
  ps. What do you mean if I have a backup? This ReadyNAS is my backup?
  - StephenB
    Guru - Experienced User
    Dec 29, 2015
    getads wrote:
    
    ps. What do you mean if I have a backup? This ReadyNAS is my backup?
    
    For some people, the ReadyNAS is only used to back up their PCs. If the ReadyNAS fails, not much harm is done since the original files are still on the PCs.
    
    But if you have original files on the NAS, then you do need backups of the NAS. RAID is not enough to keep the data safe.
    
    With one disk failure, you have no RAID redundancy, so if a second disk were to fail you'd lose everything on the NAS. So you should make sure that you have copies of everything that matters to you.
    
    getads wrote:
    
    Sure thing, I can replace this disk. I assume that I can just remove the current disk and replace with a fresh one? Then the RAID configuration should take care of syncing - is that correct?
    
    Yes. Remove the failed disk, and insert the unformatted replacement with the NAS running.
    
    I also recommend a WD20EFRX.