input / output erro when cloning

[ub007]

i'm trying to clone 2 raid sets using dd.( have done this successfully many times in the past)
this time however running into issues.

dd stops with a

'input/output error'

dmesg shows

cciss: cmd f7300000 has CHECK CONDITION sense key = 0x3
end_request: I/O error, dev cciss/c0d0, sector 31083240
cciss: cmd f7300000 has CHECK CONDITION sense key = 0x3
end_request: I/O error, dev cciss/c0d0, sector 31083240

a little above this i find

Filesystem "cciss/c0d0": Disabling barriers, trial barrier write failed
XFS mounting filesystem cciss/c0d0
XFS: log has mismatched uuid - can't recover
XFS: failed to find log head

Background:
this is a proliant sevrer & has got XFS filesystem on it.
Last weeek it showed some XFS errors, tried to do a repair but didnt work.So thought would clone the raid set from a good 'source' server. ( we need this for a test purpose )

before cloning I deleted raid & created again. everything looked OK, all disks showed as GOOD ,
but then the dd copy failed with above msg
I'm sure the source raid set is in good condition. Any thoughts on what could be wrong here & how I may be able to recover it?

Thanks in advance
David

[Freston]

Have you tried with the noerror flag on `dd`?

That should force it to continue after read errors...

[Rubberman]

When creating your raid, did you perform a badblock check on the drives?