Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!srcsip!pserv!stevem
From: stevem@pserv.UUCP (Steve Mestad)
Newsgroups: comp.sys.hp
Subject: Question on HP9000/800
Keywords: io, throughput, speed, performance
Message-ID: <105@pserv.UUCP>
Date: 8 Aug 89 02:51:41 GMT
Reply-To: stevem@pserv.UUCP (Steve Mestad)
Distribution: usa
Organization: Honeywell CFS/MO, MPLS, MN
Lines: 19

Question for the 800 series users out there.....

According to the catalogs I have seen, the series 800 systems use the
same io buses and controllers as the series 500 systems.  In particular
I recall the disk and serial boards are the same.

On the series 500, a sustained transfer will move pretty well on the
larger disks, running 750k+ bytes/sec (timed)....The series 300 will
run about 300k- bytes/sec (timed).....However file access on the 300
seems to beat the 500 every time....Dramatically in most cases.

My question is this, has this been fixed on the 800's so that they get
the 500 speed on large transfers and 300 speed on small accesses?
(E.g. the 500's are slow due to high overhead which has been fixed?)
Or is the 800 access slow like the 500 due to controller hw limits....
Or is something going on that I missed....

Thanks....
Steve Mestad  (email.....stevem%pserv@src.honeywell.com)