[linux-lvm] N00b Question: Logical Volume without a Logical Volume Group ?

Mark H. Wood mwood at IUPUI.Edu
Wed Nov 2 14:02:20 UTC 2011

BTW I wouldn't call it a "logical volume group".  It's not a group of
logical volumes, but of physical volumes to be treated as a single
slab of storage capacity.  You pile 1-n physical volumes together as a
volume group and then slice off various amounts of the group's
capacity in which to make logical volumes.

A group of one PV may seem strange at first, but it makes things
easier than having to make the LV layer understand *both* the VG and
PV layers.  Not to mention the sysadmin having to understand and
remember two different layerings.

I operate a bunch of boxes with hardware RAID and every one of them is
currently set up as 1 PV : 1 VG : n LV.  (None has enough disks to
make multiple RAID sets worthwhile, or in most cases even possible.)
I see the VG abstraction as capacity to deal with problems that just
haven't come to our shop yet.

Mark H. Wood, Lead System Programmer   mwood at IUPUI.Edu
Asking whether markets are efficient is like asking whether people are smart.
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