FYI their website is wrong. Call Manager 6.x will not install on a 380-G3 with 2-36 gig hard drives.
I ran into that problem a few weeks ago so I would double check any customer-provided hardware with TAC before trying to install.
This is what I got from Cisco:
Below is the list of HP servers which have been tested by our BU (business units) in callmanager 5.x and 6.x:
VENDOR, #CPU, CLOCK, MEM ,Hard_Disk,,Product_Name, == ,HWTYPE
HP, 2, 3400, 4096 ,4x72 SCSI,,ProLiant DL380 G4, ,7845H,
HP, 2, 3066, 4096 ,4x72 SCSI,,ProLiant DL380 G3, ,7845H,
HP, 2, 2400, 4096 ,4x72 SCSI,,ProLiant DL380 G3, ,7845H,
HP, 2, 2333, 4096 ,4x72 SCSI,,ProLiant DL380 G5, ,7845H2,
HP, 1, 3400, 2048 ,2x72 SCSI,,ProLiant DL380 G4, ,7835H,
HP, 1, 3066, 2048 ,2x72 SCSI,,ProLiant DL380 G3, ,7835H,
HP, 1, 2400, 2048 ,2x72 SCSI,,ProLiant DL380 G3, ,7835H,
HP, 1, 2333, 2048 ,2x72 SCSI,,ProLiant DL380 G5, ,7835H2,
From the list, the DL380-G3 hard disk must be upgraded to 2x72G SCSI.