On Thu, 2007-11-29 at 11:54 -0500, Kanwar Ranbir Sandhu wrote: > Hi All, > > I have an external drive cage which has been configured with two > separate RAID 5 arrays. I then used LVM to create two PVs, and then > added the volumes together under one VG. The whole shebang is mounted > on one file system (/srv). Ouch... Bad configuration. If you're looking for two dead disk support, test the Linux' kernel software RAID6 support. > > What would happen if one of the RAID arrays failed (e.g. two drives die > in RAID 5 array 1)? Would the data be safe, would I lose all data, or > would I just lose the data that was on the failed array? Two drives in either RAID will most likely kill your LVM. > > I believe I would only lose the data on the failed array, but a friend > believe I would lose the whole lot. It's a matter of blind luck, but any LV that sits on the dead RAID5 array will be taken with it. - Gilboa
