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Aspirant

Aug 19, 2015

readynas ultra 4 failed: volume not found. #25615160

Hi, My Ultra 4 failed after rebooting after a RAID scub and not the C: drive cannot be found. My case ID is #25615160 Can anyone advise how i can mount the drives so i can retrieve the data? ...

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ReadyNAS Ultra 4

mdgm-ntgr

NETGEAR Employee Retired

Aug 20, 2015

It doesn't look good to me from what I saw in the logs.

But for situations like this the logs don't necessarily give the full picture.

You could consider whether you want to purchase data recovery but do note that it may be unsuccessful.

Lham

Aspirant

Aug 20, 2015

Hi mdgm,

does it help if i pop in another "old" disk?

or can i mount the disks individually on to read data off it?

mdgm-ntgr
NETGEAR Employee Retired
Aug 20, 2015
With RAID 5 you need n-1 disks to read the data where n is the number of disks. So two disks dropping out of a RAID layer is not good.
StephenB
Guru - Experienced User
Aug 20, 2015
Lham wrote:

Hi mdgm,

does it help if i pop in another "old" disk?

or can i mount the disks individually on to read data off it?

If the NAS is on, it will just reformat the drive. If the NAS is powered down it shouldn't do that, but you will likely end up with an inconsistent array.