Data Recovery from Buffalo NAS

[Eric Cope]

that was the conclusion I came too. Regarding calling buffalo, the phone
wait time is usually estimated to 8 hours.
Thanks for the tips.
Eric

On Tue, Nov 17, 2009 at 1:23 PM, Lisa Kachold <lisakachold at obnosis.com>wrote:

>
>
> On Mon, Nov 16, 2009 at 10:10 PM, Eric Cope <eric.cope at gmail.com> wrote:
>
>> We think the drives are good. We want to mount the four drives to extract
>> the data (it was RAID 5). We only have 1 SATA2USB adapter. If I am able to
>> read the whole paritition (using dd), how can I mount 4 iso's using RAID to
>> get the data?
>>
>> On Mon, Nov 16, 2009 at 7:20 PM, Lisa Kachold <lisakachold at obnosis.com>wrote:
>>
>>> Hi ERIC
>>>
>>> On Mon, Nov 16, 2009 at 6:19 PM, Eric Cope <eric.cope at gmail.com> wrote:
>>>
>>>  some light googling revealed buffalo as a UFS partition over four
>>>> drives. Has anyone recovered a software RAID 5 configuration? Can I dd to an
>>>> iso, mount the iso's, mount the raid, extract the data, and move forward?
>>>
>>>
>>> You might have a different super block on the disk from Buffalo.   You
>>> might check your exact model (Is this a LinkStation) against the HowTo's
>>> from Buffalo?
>>>
>>> Knoppix works really well for restoring disks (every systems admin needs
>>> a knoppix USB flash)
>>>
>>> Page 218 dd_rescue  (in case there are bad blocks):
>>> http://www.scribd.com/doc/15490322/Knoppix-Hacks-by-OReilly-Media
>>>
>>> Buffalo's Wiki shows a procedure on how to restore data to a LinkStation
>>> using Knoppix:
>>>
>>> http://buffalo.nas-central.org/wiki/Upgrade_%28or_replace%29_the_existing_LinkStation_hard_drive
>>>
>>> And:
>>>
>>> http://buffalo.nas-central.org/wiki/Upgrade_%28or_replace%29_the_existing_LinkStation_hard_drive#Backup_your_entire_hard_drive.2C_partition_a_blank_drive_on_a_Knoppix_workstation
>>>
>>> Full Knoppix Hacks (ripped to Scribd):
>>> http://www.scribd.com/doc/15490322/Knoppix-Hacks-by-OReilly-Media
>>>
>>>>
>>>>
>>>>
>>>
>
>> Hi Eric
>>>
>>> According to Buffalo's wiki:
>
> With RAID5 the data is distributed accross all disks and one disk stores an
> XOR checksum of the remaining (n-1) disks. So you can loose 1 disk.
>
> In theory you should be able to connect all disks to a workstation, and
> repair it there. In practice this does not work, as the byte order<http://en.wikipedia.org/wiki/Byte_order>of a recular workstation (i386) is different and the MD driver is not endian
> agnostic. An Apple Mac is required for this.
>
> See Moving disks <http://buffalo.nas-central.org/wiki/Moving_disks>, or Terastation
> crash after power failure<http://forum.nas-central.org/viewtopic.php?f=40&t=1217&p=10728#p10728>.
>
>
> xfs_repair on the Terastation worked for me. See reb's post : Raid 5 '4 red
> lights' issue
> Reference:
> http://buffalo.nas-central.org/wiki/Terastation_Data_Recovery#RAID5
>
> *For superblock identification and data repair on one disk see
> http://buffalo.nas-central.org/wiki/Moving_disk*s
>
> Buffalo uses Linux for RAID 5 on a Terastation (what is your model - that's
> important), but the data is distributed across the drives.
>
> The easiest would be to purchase a replacement Buffalo, use it to restore
> your data (being careful to place your system in exactly the same
> configuration, marking each drive as you take it out) and when you have
> completed your task, and determine you no longer need it, return it.
> You will pay a restocking fee, at most.
>
> This ufsexplorer (tool) link might assist you to see the drive structure:
> http://www.ufsexplorer.com/inf_terastation.php
>
> And don't ask us, CALL or email Buffalo and look at their wiki!
>
>
>  --
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>>> www.it-clowns.com
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>>
>>
>>
>> --
>> Eric Cope
>> http://cope-et-al.com
>>
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-- 
Eric Cope
http://cope-et-al.com
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