Subject: Re: 3c509 again
To: Drew Hess <owner-current-users@sun-lamp.cs.berkeley.edu>
From: Missing - presumed fed. <greywolf@autodesk.com>
List: current-users
Date: 06/30/1994 17:41:39
#define AUTHOR "dhess@CS.Stanford.EDU (Drew Hess)"

/*
 * I *will* say that VLB SCSI
 * boards seem to perform better for disk benchmarks than ISA SCSI boards;
 * whether or not they make a difference in system performance (or even hurt
 * it) is what I'm not sure about.)
 *

Forgive me if my viewpoint is inaccurate, but (quick sanity check)
last I looked, ISA was 24 bits wide.  Not being a kernel engineer,
I'm not sure about when a virtual/physical translation occurs (i.e. does the
controller deal with the requests in physical or virtual memory --
at first glance it would make more sense that the address is translated
before it is handed to the controller, but VM and UNIX being what they
are...), but since everything else (EISA, PCI, VLB) runs at 32 bits,
ANY kind of SCSI other than ISA SCSI would probably perform better, no?

 * 
 * -dwh-
 * dhess@cs.stanford.edu
 * 
 * 
 * 
 * 
 * 
 */
/*** end two cents worth from Drew Hess ****/



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