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RaidZ Reconstruction
Posted: Tue Sep 13, 2011 4:51 am
by Thomas Lenti
HI!
I have lost my RAIDZ1 with 4 Disks (DATA1 - DATA2 - DATA 3 - PD). I was build With Freenas 7.0 but for try Freenas 8.0 i was deleted array without format disks!!! The Array was unreadable but my data are still on the disk.
How can use Rstudio to recovery my data??? Can you explain a guide to identify disk order???
Thanks a lot!
Re: RaidZ Reconstruction
Posted: Tue Sep 13, 2011 7:09 am
by Alt
Which file system did you use for the RAID?
Re: RaidZ Reconstruction
Posted: Wed Sep 14, 2011 4:41 am
by Thomas Lenti
I use GPT partition, RAIDZ uses ZFS filesystem... then with CIFS (SAMBA) i shares the drive with my windows.
IMPORTANT:
I have tryed using In R-Studio to creating a VIRTUAL BLOCK RAID using my lost 4 disks.
Add disk to Block Raid, random order, i have selected RAID5 and different type BLOCK oreder (Left syncronous, ecc..)
In many times R-Studio can't recovery directory structure, but find many kind of file... and a little bit of these file, (if i can see it) i can see a part of my photo (half photo) or i can hear 3-4sec of my mp3. In some case mp3 music are cropped and mixed.
This means that R-Studio can recovery my data... but, the disk data it's not correct. I think, for a perfect directory structure and file recovery i must identify the right order disk and the right BLOCK ORDER.
I can't make all combination because with 4 disk I have 24 combination, and 4 combination each one for block order...
Help how to identify Disk order and block order??? I think that FREENAS and ZFS using a know block order... but i can't find this information someone can Help me to recovery my data?
Re: RaidZ Reconstruction
Posted: Wed Sep 14, 2011 12:31 pm
by Alt
R-Studio doesn't support ZFS, unfortunately. Although, you can scan for known file types which, which you actually did.
I don't know where to find instructions on how to determine disk order for the ZFS file system. Sorry.
Re: RaidZ Reconstruction
Posted: Mon Sep 26, 2011 3:52 am
by Thomas Lenti
HI!
Ok, it's unable to recovery... but i can make all 24 (4*3*2*1) combination. I think FreeNAS uses a block order known... Do you know this block order???
does anyone know what Block Order to use FreeNAS with 4 disk?
Left Synchronous
OR
Left Asyncronous
OR
Right Synchronous
OR
Right Asyncronous ????
Someone can help me to find this information???
if i know this information i can try 24 disk order....
Thank's to anyone can help ME!
Re: RaidZ Reconstruction
Posted: Mon Sep 26, 2011 7:16 am
by Alt
I think, the best way is to contact RaidZ developers.