Как понимать «16:00 is not a CD-ROM» если 16:00 всё-таки IDE ATAPI CDROM on /dev/hdc

$ dmesg
....
SCSI subsystem driver Revision: 1.00
devfs_mk_dir(cdroms): using old entry in dir: c12c85c0 ""
hdc: attached ide-cdrom driver.
hdc: ATAPI 22X CD-ROM CD-R/RW drive, 2048kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.12
pktcdvd: 16:00 is not a CD-ROM
pktcdvd: all booked up