I believe the file extn is Ext. The OS I understand resides on the 4 HDDs in the unit and that if I use the Recovery CD it'll reinstate the OS and wipe the data, um, not so much of a recovery then!
I meant a Linux Live CD, just to make sure we understand eachother.
BTW .. I found some forum topics on this Storcenter and it looks like the file system used internally is XFS. And that is a file system that we don't support (iRecover).