Anyone running LVM and have comments about the amount of overhead it
uses?  Here's my setup:

Debian woody 2.4.27 kernel w/LVM compiled in.  Box his attached to a 
jetstor filer that hands out a chunk of disks as a single scsi target.
The jetstor is doing RAID-5.  I know little else about the filer, 
someone else admins' it.

dmesg shows:
SCSI device sda: 627932160 512-byte hdwr sectors (321501 MB)

If is just run fdisk, create one partition and then run 
"mke2fs -j -m1 /dev/sda1" I get:

Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/sda1            309030804     32828 305858396   1% /jetstor


If I setup the disk via LVM (pvcreate, vgcreate, lvcreate) I get:

Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/vg01/lv00       263191620     32828 260484924   1% /jetstor

I get the same results whether I use the entire disk "/dev/sda" or 
create a single partition of type "Linux LVM" (8e).

Any idea why LVM takes about 45 GB of overhead?  
-- 
scot

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