> From: Jason Thorpe <thorpej@nas.nasa.gov>
> Date: Tue, 09 Jun 1998 10:36:33 -0700
[...]
>  > I hasten to point out that I have a Quantum Fireball 1080S in this beast,
>  > and this may be a HDA cache-flush issue; Apple had this problem with these
>  > disks a few years ago. Is there an explicit SCSI command to force a disk to
>  > flush its cache to permanent storage?
> 
> I think there is, but I can't remember for certain... this would be good
> for a shutdownhook... each SCSI disk could register one, and ensure that
> it has flushed its cache.

How about sending a SCSI "stop" command?  (i.e. spin down)

Gordon