Hobbit doesn't graph lvm drives

[FIGARO Nicolas]

Hi, 

I installed hobbit (4.0.4-1) on a fedora core 2 linux box using the rpm,
and I can't see rrd graphes 
for my local partitions : 
Tue Jul 5 12:59:38 CEST 2005 - *Disk partitions on prdxxbk,mgen,fij OK

/dev/mapper/Volume00-LogVol00	1032088	748420	231240	77%	/
/dev/hda1	253775	6447	234226	3%	/boot
/dev/mapper/Volume01-LogVol02	3023760	837008	2033152	30%	/data
/dev/mapper/Volume01-LogVol00	1032088	689388	290272	71%	/home
/dev/mapper/Volume01-LogVol03	1935192	1531400	305488	84%	/log
/dev/mapper/Volume00-LogVol03	2967320	38668	2777920	2%	/tmp
/dev/mapper/Volume00-LogVol02	4031680	3289552	537328	86%	/usr
/dev/mapper/Volume00-LogVol01	1032088	308320	671340	32%
/usr/local
/dev/mapper/Volume01-LogVol01	2064208	288624	1670728	15%	/var

I don't know where the device names are defined or can be modified. 

The graph are fines for other unix hosts and aix hosts too (As I don't
have any other linux boxes, I can't compare). 

Has anyone ever had the same problem ? 

Nicolas Figaro