On Thu, 25 Nov 2010, Spelic wrote:
> Now I'm wondering what happens if we lose an array: all data on all arrays
> will be lost because the VG is lost?
No.
If you use LVM level raid0 (striping) on a particular LV, then losing any
component of the stripe will lose the LV (but not the VG).
If you use LVM level raid1 (mirroring) on a particular LV, then losing
any component of the mirror does not lose the LV (or the VG).
For linear LVs (extents on minimum number of PVs), losing a PV used by
the LV will lose the LV, but not the VG.
You do not gain anything by assigning a separate VG to each array -
unless you want to be able to easily remove the array.
--
Stuart D. Gathman <stuart@bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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