Was copying from a file set up with losetup + cryptsetup on a raid5
array (the one above) to a raid6 array, all of which with XFS. During
this copy I ran mdadm --examine --scan, and the raid5 crashed (the one I
was reading from), giving me input/output errors. md device is fine on
the other hand, and remounting (the read only) filesystem was no
problem. dmesg output:

[131405.242868] xfs_force_shutdown(dm-1,0x1) called from line 420 of file 
/build                                                                          
                                                      
/buildd/linux-2.6.24/fs/xfs/xfs_rw.c.  Return address = 0xffffffff883cdf59
[131405.242892] Filesystem "dm-1": I/O Error Detected.  Shutting down 
filesystem                                                                      
                                                          : dm-1
[131405.242932] Please umount the filesystem, and rectify the problem(s)
[131405.242958] xfs_force_shutdown(dm-1,0x1) called from line 420 of file 
/build                                                                          
                                                      
/buildd/linux-2.6.24/fs/xfs/xfs_rw.c.  Return address = 0xffffffff883cdf59

Not sure if it's related to the first post or not. Any input would be
appreciated.

-- 
mdadm, Raid5 and XFS stuck in uninterruptable sleep
https://bugs.launchpad.net/bugs/208551
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