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