Please help to recover filesystem XFS on RAID 5

Please help to recover filesystem XFS on RAID 5

[lublinkermi]

Hi!

I had a XFS filesystem on RAID 5, but line of the power supply 230 V had
crash . UPS failed, 2 hard disk drive on RAID (4 hard disk) failed (medium
error) - then before turn of computer I resynchronize this RAID.  Fdisk
recognized filesystem as XFS. Using dd with conv=noerror, sync I clone XFS
filesystem on external hard disk. After restart machine I never can
resynchronize RAID to see XFS filesystem. Then I connect hard disk to
computer I can mount , but I see numbers as filename with extensions.

xfs_db -c "sb 0" -c "p" /dev/sde5 said:
magicnum = 0x58465342
blocksize = 4096
dblocks = 183103920
rblocks = 0
rextents = 0
uuid = e2716dab-5b52-085e-eae2-3d8442c32a1a
logstart = 134217735
rootino = 256
rbmino = 257
rsumino = 258
rextsize = 1
agblocks = 5722000
agcount = 32
rbmblocks = 0
logblocks = 89406
versionnum = 0xbdb4
sectsize = 4096
inodesize = 256
inopblock = 16
fname = "\000\000\000\000\000\000\000\000\000\000\000\000"
blocklog = 12
sectlog = 12
inodelog = 8
inopblog = 4
agblklog = 23
rextslog = 0
inprogress = 0
imax_pct = 25
icount = 37056
ifree = 7341
fdblocks = 181668411
frextents = 0
uquotino = 0
gquotino = 0
qflags = 0
flags = 0
shared_vn = 0
inoalignmt = 2
unit = 16
width = 48
dirblklog = 0
logsectlog = 12
logsectsize = 4096
logsunit = 4096
features2 = 0xa
bad_features2 = 0xa

xfs_repair :
couldn't verify primary superblock not enough secondary superblocks with
matching geometry
attempting to find secondary superblock......................

xfs_check said
cannot init perag data (117).

I use xfs_explorer, UFS Explorer Professional Recovery, photorec, testdisk
to recover files, but any of this nothing do.

It's very important because on filesystem XFS there was a virtual machine
file with many MS SQL databases. I can't have backup because packed backup
file has a 17 GB,  external hard disk destroyed after the supertension of
the energy network.

Please help me...

 



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Re: Please help to recover filesystem XFS on RAID 5

[Emmanuel Florac]

Le Fri, 27 Dec 2013 09:56:32 -0800 (PST) vous écriviez:

> I had a XFS filesystem on RAID 5, but line of the power supply 230 V
> had crash . UPS failed, 2 hard disk drive on RAID (4 hard disk)
> failed (medium error) - then before turn of computer I resynchronize
> this RAID.  Fdisk recognized filesystem as XFS. Using dd with
> conv=noerror, sync I clone XFS filesystem on external hard disk. 

You should try to repair your failed hard disks. I've saved a RAID-5
array recently with 3 defective drives by using GRC Spinrite: it
remapped enough bad blocks to get the array up again, though Seatools
couldn't do it.

After that you're good for Kroll Ontrack and friends... Unfortunately
that's how people learn how backups are necessary, by losing data.

-- 
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Emmanuel Florac     |   Direction technique
                    |   Intellique
                    |	<eflorac@intellique.com>
                    |   +33 1 78 94 84 02
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