Help please - DISK 2 error reported and NAS has shutdown

[taylormj4]

Hi ,
We have a Buffalo Linkstation LS_WVL. Early Sat morning I started receiving emails from it saying:
-----------------------------------------
DISK Error Notification

HDD error occurred
Disk(s) the error occurred:"Disk 2"


(sdb) READ sector:987139441 count:1
Disk writing error
RAID drive error will be repaired automatically.
Continuous backup is recommended.
--------------------------------

I received several of these, referring to the same Sector and then also sector 987139454.

Then received a "Disk performance down" message:
-------------------------------------
DISK Error Notification

HDD error occurred
Disk(s) the error occurred:"Disk 2"


reached alert level.
-----------------------------------

Then started receiving READ error emails, e.g.:

------------------------------------
DISK Error Notification

HDD error occurred
Disk(s) the error occurred:"Disk 2"


(sdb) READ sector:987139454 count:11
Disk writing error
RAID drive error will be repaired automatically.
Continuous backup is recommended.
--------------------------------------

Multiple read error messages were sent to me but all refer to the above sector.

Regretably, the drive is in RAID0 configuration as it arrived. I wanted RAID 1 but by the time I realised it was in RAID 0 by default the drive had been in use for several months and when I tried to back it up (so that I could swap to RAID1) we could not copy hundreds of the files over (tried several types of software to do the copy but all failed to do a complete backup). It seems to be due to overlength filenames but the copy programmes don't tell you which directory they are in.

Oddly, the NAS drive has shut itself down, presumably to protect itself ?

So my question is, firstly, can I turn the NAS back on and see if I can recover anything or will that cause more damage ?

Secondly, even though the error messages above say "RAID drive error will be repaired automatically" I presume it will not have done this as it was in RAID 0 config. Is that correct or will the drive now just ignore the bad sectors ?

We do have a backup of 95% of the files. Ironically, the drive failed whilst running a full back-up to another drive.

Thanks for any help. Regards.

[davo]

Replace the disk, then you will need to delete the RAID and create a new array. The data is gone if there is a physical issue on disk2 (which the email notification is reporting).