Andreas Wrede wrote:

| sd0(ahc0:0:0): timed out in dataout phase, SCSISIGI == 0x0
| ahc0: Issued Channel A Bus Reset #2. 2 SCBs aborted
| ahc0: target 0 synchronous at 10.0MHz, offset = 0xf

I see something similar with CDROMs when using tosha or cdd:

ahc0: target 1 synchronous at 20.0MHz, offset = 0xf
cd0(ahc0:1:0): timed out in dataout phase, SCSISIGI == 0x0
cd0(ahc0:1:0): BUS DEVICE RESET message queued.
Bus Device Reset Message Sent
cd0(ahc0:1:0): Bus Device Reset delivered. 1 SCBs aborted
cd0(ahc0:1:0): host adapter code inconsistency
cd0(ahc0:1:0):  Check Condition on CDB: 0x1e 00 00 00 00 00
    SENSE KEY:  Unit Attention
     ASC/ASCQ:  Power On, Reset, or Bus Device Reset Occurred

ahc0: target 1 synchronous at 20.0MHz, offset = 0xf
cd0(ahc0:1:0): timed out in dataout phase, SCSISIGI == 0x0
cd0(ahc0:1:0): BUS DEVICE RESET message queued.
Bus Device Reset Message Sent
cd0(ahc0:1:0): Bus Device Reset delivered. 1 SCBs aborted
cd0(ahc0:1:0): host adapter code inconsistency
cd0(ahc0:1:0):  Check Condition on CDB: 0x1e 00 00 00 00 00
    SENSE KEY:  Unit Attention
     ASC/ASCQ:  Power On, Reset, or Bus Device Reset Occurred

ahc0: target 1 synchronous at 20.0MHz, offset = 0xf


This happens on two different models of SCSI CD-ROMs.

So far the only characterization is that by using the "-t #" option of
either command with a track somewhere in the middle of the CD, I 
usually can get the CDROM drive "warmed up" so that I can abort the 
command and reissue it with any other track (or tell it just to grab
all the tracks).

I've never seen this on a disk.

	Sean.