As fewer people are required to use scsi emulation to use cdrecord in Linux, here is how you would execute a scanbus command using cdrecord on ATAPI devices:
primary Linux # cdrecord dev=ATAPI --scanbus
Cdrecord-ProDVD-Clone 2.01.01a20 (i686-pc-linux-gnu) Copyright (C) 1995-2006 Jörg Schilling
scsibus: -2 target: -2 lun: -2
Warning: dev=ATA: is preferred over dev=ATAPI:.
Warning: Using ATA Packet interface.
Warning: The related Linux kernel interface code seems to be unmaintained.
Warning: There is absolutely NO DMA, operations thus are slow.
Using libscg version 'schily-0.8'.
0,0,0 0) 'SONY ' 'CD-RW CRX230E ' 'QYS1' 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) *