Who faced a subject? In particular, spoil the configuration files. For example, instead of virtual servers in Apache, suddenly there is text garbage (clear text) mixed with krokozyabra.
Can this trouble lead to the fact that in the recovery mode (boot from Resque CD) one of the partitions on the disk included in the RAID 1 was pronounced separately as ext3, it fixed a few files and then booted from the RAID?