It seems that df(1) notices disk partitions that are managed by the
Logical Volume Manager (LVM) and changes its listing format to make
two lines of output.  Example, best viewed with fixed-width font:

* [EMAIL PROTECTED] etc]$ df -h
* Filesystem            Size  Used Avail Use% Mounted on
* /dev/sda2             7.9G  449M  7.1G   6% /
* /dev/mapper/VG00-LV06
*                        40G  9.7G   28G  26% /data
* /dev/mapper/VG01-LV01
*                        79G   31G   44G  42% /data2
* none                  633M     0  633M   0% /dev/shm
* /dev/mapper/VG00-LV01
*                       9.9G  538M  8.9G   6% /home

Note that lines have been edited to begin with * to discourage gmail
from reformatting the white space.

I painfully went through the process to rename VolGroup00-LogVol00 to
VG00-LV00, etc., just to make the names shorter, but this did not
help.

So shell scripts that parse df(1) output by looking for lines that
begin with /dev no longer work as intended.  The data that belongs to
the /dev/xxx name is now on the following line, if it's a partition
managed by LVM.

    carl
-- 
    carl lowenstein         marine physical lab     u.c. san diego
                                                 [EMAIL PROTECTED]
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