/dev/[r]scd0a
accesses BSD partition on the disc. Normally, there is only one file system on a CDROM disc.
Sony cdu31/33 cd-rom driver
device scd 1
In /boot/device.hints: hint.scd.0.at="isa" hint.scd.0.port="0x230"
The scd driver provides a data interface to the Sony CDU31 and CDU33A CD-ROM drives. The drive must be hooked to a Sony proprietary interface card or a compatible clone.
/dev/[r]scd0a
accesses BSD partition on the disc. Normally, there is only one file system on a CDROM disc.
/dev/[r]scd0c
accesses the raw device.