stucked on reading bad cd-rom

[Miroslav Lachman]

On 15/06/2020 13:41, Eugene Grosbein wrote:
> 15.06.2020 18:10, Miroslav Lachman wrote:
> 
>> I am running FreeBSD 11.3. Whenever I inserted some 20 year old CD (backups on CD-R) which is currently unreadable the system is trying to read the CD even after I want to eject it by button in the CD drive or "eject" command.
>>
>> These messages are repeatedly logged in messages
>>
>> Jun 15 13:05:28 illbsd kernel: (cd0:ahcich2:0:0:0): Error 6, Unretryable error
>> Jun 15 13:05:28 illbsd kernel: (cd0:ahcich2:0:0:0): cddone: got error 0x6 back
>> Jun 15 13:05:28 illbsd kernel: (cd0:ahcich2:0:0:0): READ(10). CDB: 28 00 00 00 00 00 00 00 11 00
>> Jun 15 13:05:28 illbsd kernel: (cd0:ahcich2:0:0:0): CAM status: SCSI Status Error
>> Jun 15 13:05:28 illbsd kernel: (cd0:ahcich2:0:0:0): SCSI status: Check Condition
>> Jun 15 13:05:28 illbsd kernel: (cd0:ahcich2:0:0:0): SCSI sense: NOT READY asc:3a,2 (Medium not present - tray open)
>>
>> It can take from 1 to 5 minutes from pressing eject to actually open the drive.
>>
>> Is there something I can do to not wait too long for this? Any tuneables or command to interrupt endless reading?
> 
> Perhaps it's GEOM doing multiple "taste" attempts to detetmine logical format of the media.
> Try setting "sysctl kern.geom.notaste=1" temporary.

It seems it helped.
Thank you!

Miroslav Lachman