Thanks,
It's a really strange I was rearranging a directory basically copying the contents of a few sub folders to new folder and then I deleted the now empty sub folders
I didn't notice at the time the box was degraded
Powered the box up today and discovered the new folder had 3 files (should have had 11) and the some of the subfolders had reappeared without contents
looks like it did some kind of roll back
Log is here :-
2007/01/26 16:20:36 N5200-2 : N5200-2 boot
2007/01/26 16:23:29 N5200-2 : User admin logged in from 192.168.0.3
2007/01/26 22:09:26 N5200-2 : The system N5200-2 shutdown.
2007/01/27 09:15:04 N5200-2 : [Disk sda] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 09:15:04 N5200-2 : [Disk sdb] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 09:15:04 N5200-2 : [Disk sdc] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 09:15:04 N5200-2 : [Disk sdd] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 09:15:04 N5200-2 : [Disk sde] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 09:15:04 N5200-2 : Assemble RAID from [ /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2 /dev/sde2 ]
2007/01/27 09:15:04 N5200-2 : mdadm: failed to RUN_ARRAY /dev/md0: Input/output error
2007/01/27 09:15:06 N5200-2 : Incorrect LVM archticher
2007/01/27 09:15:06 N5200-2 : [Disk sda] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 09:15:06 N5200-2 : [Disk sdb] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 09:15:06 N5200-2 : [Disk sdc] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 09:15:06 N5200-2 : [Disk sdd] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 09:15:06 N5200-2 : [Disk sde] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 09:15:06 N5200-2 : Assemble RAID from [ /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2 /dev/sde2 ]
2007/01/27 09:15:06 N5200-2 : mdadm: forcing event count in /dev/sdb2(1) from 17877 upto 17885
mdadm: /dev/md0 has been started with 4 drives (out of 5).
2007/01/27 09:15:14 N5200-2 : N5200-2 boot
2007/01/27 22:41:52 N5200-2 : [Disk sda] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 22:41:52 N5200-2 : [Disk sdb] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 22:41:52 N5200-2 : [Disk sdc] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 22:41:52 N5200-2 : [Disk sdd] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 22:41:52 N5200-2 : [Disk sde] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04;Tue Nov 21 13:35:34 2006]
2007/01/27 22:41:53 N5200-2 : Assemble RAID from [ /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2 /dev/sde2 ]
2007/01/27 22:41:53 N5200-2 : mdadm: failed to RUN_ARRAY /dev/md0: Input/output error
2007/01/27 22:41:54 N5200-2 : Incorrect LVM archticher
2007/01/27 22:41:54 N5200-2 : [Disk sda] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 22:41:54 N5200-2 : [Disk sdb] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 22:41:54 N5200-2 : [Disk sdc] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 22:41:54 N5200-2 : [Disk sdd] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 22:41:54 N5200-2 : [Disk sde] UUID[raid5;835fa36a:38b14c47:562896a1:88b07d04]
2007/01/27 22:41:55 N5200-2 : Assemble RAID from [ /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2 /dev/sde2 ]
2007/01/27 22:41:55 N5200-2 : mdadm: forcing event count in /dev/sdb2(1) from 18121 upto 18199
mdadm: forcing event count in /dev/sdc2(2) from 18121 upto 18199
mdadm: forcing event count in /dev/sdd2(3) from 18121 upto 18199
mdadm: /dev/md0 has been started with 4 drives (out of 5).