Tagged Queueing and Dque Bit

[Steven N. Hirsch]

On Wed, 7 Jan 1998, Klaus Steinberger wrote:

> > Bingo, I think you have the Gold medal now! :)  Why does IBM and Seagate
> > ship their drives that way?  Especially since getting in with a SCSI mode
> > page editor is a *very* dangerous task for the uninitiated?  Are they
> > looking for something to increase the work load in an otherwise underworked
> > tech support and RMA staff?
> 
> At least IBM seems to have learned. I have a bunch of newer IBM drives
> (like DORS-32160W), and these have the correct Dque setting.
> 
> Maybe it was also an OEM case, as the drive on which I had the problem
> was a OEM drive for SGI (the drive was originally in a Indigo, till it
> was much too small to hold IRIX). The drive even claims to be from
> vendor SGI, Product id is IBMDSAS-3540. 

That must be it.  My IBM DFHS S4W was an OEM pull from a PowerMac.  Many,
many thanks for the clue about Dque!  I cleared the bit and tagged
queueing works on that drive for the first time <g>.

Steve