From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 17 Feb 2009 11:16:24 +0000
From: "Bryn M. Reeves" <bmr@redhat.com>
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Subject: Re: [linux-lvm] File system size difference betwen lvdisplay & df -h
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To: Dayanand Math <dmmath@gmail.com>
Cc: LVM general discussion and development <linux-lvm@redhat.com>

Dayanand Math wrote:
> Hi,
> 
> The following df -h & lvdisplay shows the discrpancy..What could be
> the reson? I am referring to the discrepancy between LV Size in
> lvdisplay &  total size df -h output of the corresponding file
> system.

That just appears to be normal file system overheads. All file systems
use some of the total space available on a device for storing internal
structures and data (the file system's metadata). You'll see this with
any block device type, e.g. with a 64M USB key:

# df -h /mnt
Filesystem            Size  Used Avail Use% Mounted on
/dev/sdc1              61M  5.3M   53M  10% /mnt

Regards,
Bryn.