NOTE: you should also read README.xxxBSD

The sparc hostadapter driver software in NetBSD has a bug:

An internal copy of the SCSI status byte will never be updated.
However, this internal copy is always returned so the 
SCSI library always belives that an error occured.

As this implementation bug makes it impossible to sense
other error/excption conditions the driver needs to be fixed.

As a workaround you can activate a hack in the file scsi-bsd.c
by using

./Gmake COPTX=-DBSD_SCSI_SENSE_BUG

to compile cdrecord

Jörg