Apparent total loss of all Raid 1 data from both drives`

[Robert Karge]

Robin,

Thanks for the reply.

The rebuilt array, MD0, df shows only 1% used.

These disks are not included in LVM.

Bob Karge

On Thu, Mar 5, 2009 at 12:36 PM, Robin Laing <Robin.Laing at drdc-rddc.gc.ca>wrote:

> Bruno Wolff III wrote:
>
>> On Thu, Mar 05, 2009 at 10:26:57 -0500,
>>  Robert Karge <rkargeconsulting at gmail.com> wrote:
>>
>>> Any help would be very much appreciated.  I have reloaded F10 (on the
>>> boot
>>> drive) but both drives from the original Raid 1 still appear to be
>>> totally
>>> empty.
>>>
>>> It is paradoxical how much the total loss of years of work and data
>>> teaches
>>> about better backup functionality.
>>>
>>
>> It is unlikely that you have really lost all of the data based on what you
>> said you did. You do want to be careful about what you do now so that you
>> don't make things worse while trying to fix things.
>> The rescue disk suggestion is probably the way to start.
>> If you are going to try to do something dangerous, you may want to
>> consider
>> pulling one of the disks. This has its own set of risks though and you
>> would
>> want to make sure if you got things back, that you back stuff up before
>> trying to add the disk back into the raid array.
>>
>>
> I will agree with this. statement.
>
> With a 500GB drive, I would use this as a work disk.  I would do an install
> that doesn't look at the RAID drives.  I would actually disconnect them.
>
> Now you said that you rebuilt the RAID.  After to did a rebuild, did you
> have the same LVM settings?  I ask  this because I had a real nightmare with
> LVM and a RAID 1 some time ago.  I refuse to use LVM now.
>
> How much data is on the rebuilt array?  What does df give you?
>
> If worse comes to worse, you can use forensic tools to scan your drives for
> data.  I had to do this with my problem.  I put the one drive into a USB
> port and mounted it read only to scan the drive.
>
> The worse thing you can do is panic and rush.  It took me almost a week to
> recover some data after I forgot to back it up when I did a full system
> redesign and rebuild.
>
> Good luck.
>
> --
> Robin Laing
>
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