> (esp0:6:0): select; 1 left in DMA buffer [intr 18, stat 17, step 4]
> 
> I have two SCSI disks on the system, nothing else.  Am I losing data,
> will my partitions be corrupted, am I bound to crash?

If all you are seeing is this diagnostic message then there is little chance
of losing data. The message is generated during the SCSI selection phase.
If data transfers complete without further messages then those are
probably Ok.  How often do these messages appear?

-pk