> If I then have to increase the size of lv_baz I need more physical
> extents in vg_bar. I see two possibilities:
> 1. Creating a new partition on the disk occupying the rest of it, ...
> 2. Increasing the size of the one primary partition (delete and ...
> [3] I could also avoid a parition table at all

I avoid #1 because my SAN can do snapshots of individual LUNs only; i.e., there 
is no way to get a consistent snapshot of an LV composed of multiple PVs on 
multiple LUNs. I also have a completely irrational fear of losing just one of 
the LUNs.

Only #1 and #3 can be accomplished without downtime, but you can't do #3... 
unless

[4] Create a new, larger LUN; pvmove all data there; and drop the original LUN.
-- 
Rich Graves http://claimid.com/rcgraves
Carleton.edu Sr UNIX and Security Admin
CMC135: 507-222-7079 Cell: 952-292-6529

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