I followed the guidelines of the wiki. I have ran the checks again and posted the results for disks 5, 6, 7 and 11.
Disk 5
reiserfsck
reiserfsck 3.6.27
Will read-only check consistency of the filesystem on /dev/md5
Will put log info to 'stdout'
Failed to open the device '/dev/md5': Unknown code er3k 127
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Disk 6
xfs_repair -n
Phase 1 - find and verify superblock...
Phase 2 - using internal log
- zero log...
Log inconsistent or not a log (last==0, first!=1)
empty log check failed
zero_log: cannot find log head/tail (xlog_find_tail=22)
- scan filesystem freespace and inode maps...
sb_icount 64, counted 32
sb_ifree 61, counted 29
sb_fdblocks 2424059642, counted 2441087411
- found root inode chunk
Phase 3 - for each AG...
- scan (but don't clear) agi unlinked lists...
- process known inodes and perform inode discovery...
- agno = 0
- agno = 1
- agno = 2
- agno = 3
- agno = 4
- agno = 5
- agno = 6
- agno = 7
- agno = 8
- agno = 9
- process newly discovered inodes...
Phase 4 - check for duplicate blocks...
- setting up duplicate extent list...
- check for inodes claiming duplicate blocks...
- agno = 0
- agno = 2
- agno = 1
- agno = 3
- agno = 4
- agno = 6
- agno = 5
- agno = 8
- agno = 9
- agno = 7
No modify flag set, skipping phase 5
Phase 6 - check inode connectivity...
- traversing filesystem ...
- traversal finished ...
- moving disconnected inodes to lost+found ...
Phase 7 - verify link counts...
Maximum metadata LSN (1:78) is ahead of log (0:0).
Would format log to cycle 4.
No modify flag set, skipping filesystem flush and exiting.
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Disk 7
Phase 1 - find and verify superblock...
bad primary superblock - bad CRC in superblock !!!
attempting to find secondary superblock...
....................................
Note: The disk check has been running for over six hours
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Disk 11
Phase 1 - find and verify superblock...
bad primary superblock - bad CRC in superblock !!!
attempting to find secondary superblock...
.found candidate secondary superblock...
verified secondary superblock...
would write modified primary superblock
Primary superblock would have been modified.
Cannot proceed further in no_modify mode.
Exiting now.