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Recovering linux Raid5
Posted: Sun Mar 27, 2011 5:04 pm
by Gigabitz
Hi Guys,
I lost 1 of 4 drives in my raid 5 set... then I suffered a powerfailure. I can longer access my data on these drives.
When I scan for these in rstudio, all I get is recognized files... no partitions /file folder structures are present.
I'm still under the impression the data exists as , some of the know files are photos and they load up fine.
Any tips on how I can recover this data // view the folder structure would be appreciated
Re: Recovering linux Raid5
Posted: Mon Mar 28, 2011 4:19 am
by Alt
What was the file system on that RAID 5? Ext FS?
Re: Recovering linux Raid5
Posted: Mon Mar 28, 2011 5:24 am
by Camels
Yes it was ext2 or ext3.. I have gotten little further now... Im now able to see some of the folder structure but I still have 30% of scanning to go..
I initially had to scan the disks, then a volume was displayed underneath them.. then I added the volumes into a raid set in what I believe to be the correct order and now some of the folders are showing...
It is a very long process, but so far appears to be good and I really have no other choice.. i'll be happy if I can get some of the data... Some of the files appear to have a red mark on them.. I guess that means they are damaged or perhaps the not enough scan info is available for rstudio to know whether it is a full file..
Is there a better way of doing this? and why would it be that I cant see the entire folder structure?? although im still waiting for the scan to finish, I have scanned 1.5TB out of 2.5TB and the foldres it is showing never added upto 500GB..
Sorry to burden you with a million questions.. im still trying to figure it all out..
Thanks for answering
Re: Recovering linux Raid5
Posted: Mon Mar 28, 2011 7:40 am
by Alt
Camels wrote:I initially had to scan the disks, then a volume was displayed underneath them.. then I added the volumes into a raid set in what I believe to be the correct order and now some of the folders are showing...
Yes, R-Studio detected a valid partition on the virtual RAID. Did you double-click on it to see what files R-Studio had detected?
Camels wrote:
It is a very long process, but so far appears to be good and I really have no other choice.. i'll be happy if I can get some of the data... Some of the files appear to have a red mark on them.. I guess that means they are damaged or perhaps the not enough scan info is available for rstudio to know whether it is a full file..
A red cross on a file icon means that the file had been deleted, but R-Studio managed to detect it. I recommend you to look at R-Studio help. You can do that online:
R-Studio help.
Re: Recovering linux Raid5
Posted: Mon Mar 28, 2011 4:55 pm
by Camels
OK Cool.. Thanks Alt..
Thanks for pointing me to the help files, I know understand a little more
Yes I opened partition and some of my files and folder structure are there... If I try to recover anything I get an error..
Position of file fragment (16140511215616) is outside filesystem size (3000606523392) while recovering *filename* Try to recover this file using all recognized partitions.
It also says "Can't regenerate RAID5 parity".. Does this mean the disk order is wrong?
Re: Recovering linux Raid5
Posted: Tue Mar 29, 2011 5:59 am
by Alt
Camels wrote:
It also says "Can't regenerate RAID5 parity".. Does this mean the disk order is wrong?
Yes, something is wrong in RAID parameters.