> Two things come to mind, one being that to find many of the changer 
> robots, the kernel must be recompiled, enabled the 'scan all luns' 
> option.  The other being that devices are assigned in the order 
> detected by the kernel, so whats at /dev/sg0, /dev/sg1, /dev/sg2, and 
> /dev/sg3?  This should all be reported in your /var/log/dmesg file.


Aplogies i forgot....

# scsi_info /dev/sg0 
SCSI_ID="0,0,0"
MODEL="IBM DNES-318350W"
FW_REV="SA30"

# scsi_info /dev/sg1
SCSI_ID="0,1,0"
MODEL="IBM DNES-318350W"
FW_REV="SA30"

# scsi_info /dev/sg2
SCSI_ID="0,4,0"
MODEL="HP C5713A"
FW_REV="H910"

# scsi_info /dev/sg3
SCSI_ID="0,4,1"
MODEL="HP C5713A"
FW_REV="H910"

thanks

Tom