cvs commit: src/sys/cam/scsi scsi_da.c

[mjacob at freebsd.org]

>
> That's fine, but you'd also have to track things like MODE SELECT or COPY or 
> FORMAT or other commands that might actually dirty the media without being a 
> WRITE.

No, no, no. Things like MODE SELECT or COPY or FORMAT are out of scope 
of SYNCHRONIZE CACHE- I don't have time at the moment to chase this, but 
I'll bet you this is laid out in sbc2 somewhere.

> I don't see why GEOM can't open the device read-only to do its probe. Doesn't 
> it use a device vnode?

Sure- but daclose still needs to be made cognizant of that anyway.