Thread: Recover a Raid 5 Array

recover raid 5 array
i have software (mdadm) raid 5 array (3) 3tb drives, gpt , formatted ntfs (the idea make compatible windows, isn't possible). these purely data drives. upgraded boot drive , haven't been able mount array since. assembles fine, shows 3 drives in sync, persistent superblocks. can fail recovery drive , add , sync fine. read ntfs gparted. when try , mount array, though, ntfs-3g error array has no superblock , filesystem inconsistent. gparted shows /dev/md0 registers unallocated.
haven't use mdadm --create out of fear format drives, , can't use mdadm --build on raid5. fdisk useless on drives size. mdadm chkdsk useless windows won't see raid array. parted won't handle ntfs drives. ntfsfix gives 'bad magic' error. @ point need access data on drives (have 6 tb copy them to) when mount drives individually raid mount folders.

--------------mdstat results:
cat /proc/mdstat
personalities : [raid6] [raid5] [raid4] [linear] [multipath] [raid0] [raid1] [raid10]
md0 : active raid5 sdc1[1] sdb1[3] sda1[4]
5860527104 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [uuu]

unused devices: <none>


----------- mdadm -e on devices results:
sudo mdadm -e /dev/sd[abc]1
/dev/sda1:
magic : a92b4efc
version : 1.2
feature map : 0x0
array uuid : 797fec5c:0513c396:f60051ab:c97d884b
name : smizmar:0 (local host smizmar)
creation time : tue jul 12 19:34:47 2011
raid level : raid5
raid devices : 3

avail dev size : 5860528128 (2794.52 gib 3000.59 gb)
array size : 11721054208 (5589.03 gib 6001.18 gb)
used dev size : 5860527104 (2794.52 gib 3000.59 gb)
data offset : 2048 sectors
super offset : 8 sectors
state : clean
device uuid : 03ad01cd:b13286bd:e6f30b52:e9a76952

update time : thu nov 17 21:04:34 2011
checksum : ce5ce7aa - correct
events : 338006

layout : left-symmetric
chunk size : 512k

device role : active device 0
array state : aaa ('a' == active, '.' == missing)
/dev/sdb1:
magic : a92b4efc
version : 1.2
feature map : 0x0
array uuid : 797fec5c:0513c396:f60051ab:c97d884b
name : smizmar:0 (local host smizmar)
creation time : tue jul 12 19:34:47 2011
raid level : raid5
raid devices : 3

avail dev size : 5860528128 (2794.52 gib 3000.59 gb)
array size : 11721054208 (5589.03 gib 6001.18 gb)
used dev size : 5860527104 (2794.52 gib 3000.59 gb)
data offset : 2048 sectors
super offset : 8 sectors
state : clean
device uuid : 1a8fca29:7791e655:d415f39f:1c130d06

update time : thu nov 17 21:04:34 2011
checksum : c510b5a6 - correct
events : 338006

layout : left-symmetric
chunk size : 512k

device role : active device 2
array state : aaa ('a' == active, '.' == missing)
/dev/sdc1:
magic : a92b4efc
version : 1.2
feature map : 0x0
array uuid : 797fec5c:0513c396:f60051ab:c97d884b
name : smizmar:0 (local host smizmar)
creation time : tue jul 12 19:34:47 2011
raid level : raid5
raid devices : 3

avail dev size : 5860528128 (2794.52 gib 3000.59 gb)
array size : 11721054208 (5589.03 gib 6001.18 gb)
used dev size : 5860527104 (2794.52 gib 3000.59 gb)
data offset : 2048 sectors
super offset : 8 sectors
state : clean
device uuid : e951e10c:f0703968:e9618277:bfc3850b

update time : thu nov 17 21:04:34 2011
checksum : 978254a4 - correct
events : 338006

layout : left-symmetric
chunk size : 512k

device role : active device 1
array state : aaa ('a' == active, '.' == missing)

---------------mdadm -e /dev/md0 results:
sudo mdadm -e /dev/md0
mdadm: no md superblock detected on /dev/md0.

----------------mount command results:
ntfs-3g /dev/md0 /media/doop
ntfs_mst_post_read_fixup: magic: 0x00000000 size: 1024 usa_ofs: 0 usa_count: 65535: invalid argument
record 0 has no file magic (0x0)
failed load $mft: input/output error
failed mount '/dev/md0': input/output error
ntfs either inconsistent, or there hardware fault, or it's a
softraid/fakeraid hardware. in first case run chkdsk /f on windows
reboot windows twice. usage of /f parameter very
important! if device softraid/fakeraid first activate
, mount different device under /dev/mapper/ directory, (e.g.
/dev/mapper/nvidia_eahaabcc1). please see 'dmraid' documentation
more details.

---------------ntfsfix results:
ntfs-3g /dev/md0 /media/doop
ntfs_mst_post_read_fixup: magic: 0x00000000 size: 1024 usa_ofs: 0 usa_count: 65535: invalid argument
record 0 has no file magic (0x0)
failed load $mft: input/output error
failed mount '/dev/md0': input/output error
ntfs either inconsistent, or there hardware fault, or it's a
softraid/fakeraid hardware. in first case run chkdsk /f on windows
reboot windows twice. usage of /f parameter very
important! if device softraid/fakeraid first activate
, mount different device under /dev/mapper/ directory, (e.g.
/dev/mapper/nvidia_eahaabcc1). please see 'dmraid' documentation
more details.

i'm no expert, , don't know if left out on purpose, shouldn't use sudo ntfs-3g? have noticed lots of times errors show not problem sudo command missing.
though it's not in post, command tried was:

sudo ntfs-3g /dev/md0 etc...?

ps. should able use:

sudo mount /dev/md0 etc...

works read access that's need copy data. if remember correctly should show warning read should still work ntfs.

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