Hi Im trying to burn an ISO image as root, but when I type cdrecord -scanbus shows up:

Cdrecord 2.00.3 (i686-pc-linux-gnu) Copyright (C) 1995-2002 J�rg Schilling
cdrecord: No such file or directory. Cannot open '/dev/pg*'. Cannot open SCSI driver.
cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
cdrecord: For possible transport specifiers try 'cdrecord dev=help'.

What could be the problem?

What kernel are you using?
Is it an IDE cd or SCSI

what is your cd's access point?

does it work as a user?

if its an ide drive, use this:
cdrecord dev=ATAPI your_scanbus_number

Thanks Im using 2.4.22 kernel and I did:

root@r0ot:/home/user# cdrecord -scanbus dev=ATAPI:0,0
Cdrecord 2.00.3 (i686-pc-linux-gnu) Copyright (C) 1995-2002 J�rg Schilling
scsidev: 'ATAPI:0,0'
devname: 'ATAPI'
scsibus: 0 target: 0 lun: 0
Warning: Using ATA Packet interface.
Warning: The related libscg interface code is in pre alpha.
Warning: There may be fatal problems.
Using libscg version 'schily-0.7'
scsibus0:
0,0,0 0) 'SAMSUNG ' 'CDRW/DVD SN-324F' 'U201' Removable CD-ROM
0,1,0 1) *
0,2,0 2) *
0,3,0 3) *
0,4,0 4) *
0,5,0 5) *
0,6,0 6) *
0,7,0 7) *


Now how can I burn it? with cdrecord -v speed=24 dev=0,0,0 image.iso? how can I know my CDROM Vel?

You were really close. It's

cdrecord -v speed=24 dev=ATAPI:0,0 image.iso

And you may want to add the 'driveropts=burnfree' flag, like this

cdrecord -v speed=24 driveropts=burnfree dev=ATAPI:0,0 image.iso

It could save you from making a coaster or two ;-)

Enjoy!
--- Cerbere