acd0, error=0x00

[dima]

Hello.

Can anybody tell me why that may happens?:
acd0: READ_BIG - MEDIUM ERROR asc=0x02 ascq=0x00 error=0x00
acd0: READ_BIG - MEDIUM ERROR asc=0x02 ascq=0x00 error=0x00
acd0: READ_BIG - MEDIUM ERROR asc=0x02 ascq=0x00 error=0x00
acd0: READ_BIG - MEDIUM ERROR asc=0x02 ascq=0x00 error=0x00
acd0: READ_BIG - MEDIUM ERROR asc=0x02 ascq=0x00 error=0x00

P.S. FreeBSD 4.11-RELEASE-p13, acd0 - TEAC CD-RW.
--
dima <7509107*mail,ru> <2:550/112>