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Ubuntu - HDD error fsck died with exit status 4

bmsjeff asked
Last Modified: 2012-06-27
I have not Ubuntu experience.

on boot I get:
/dev/sda1 clean
fsck 1.40.8
/dev/md0 contains a file system with errors, check forced
Duplicate or bad block in use!
/dev/md0: Multiply-claimed block(s) in inode 8: 24576
/dev/md0: Multiply-claimed block(s) in inode 4981200: 24576

/dev/md0: Unexpected inconsistency; run fsck Manually
fsck died with exit status 4

RAID1 (software)
I have cloned the drive and it is bootable.

What steps should I take to repair this error, assuming the drives are ok.
I am testing that now.
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