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From: mo@seismo.CSS.GOV (Mike O'Dell)
Newsgroups: comp.sys.mac
Subject: A/UX filesystem performance
Message-ID: <44025@beno.seismo.CSS.GOV>
Date: Wed, 15-Jul-87 22:34:10 EDT
Article-I.D.: beno.44025
Posted: Wed Jul 15 22:34:10 1987
Date-Received: Sat, 18-Jul-87 02:03:52 EDT
Organization: Center for Seismic Studies, Arlington, VA
Lines: 22


Someone reported that A/UX on the Mac II only gets about 50 KBytes/second
out of its disk and wondered why.  He also suggested the cause in his
list of possibles:
	The System V Filesystem

Shucks, folks, I've got a SysV machine with 4 12.5 Megahertz 68000's
with Eagle disk drives that only gets 50 KBytes/second through
the filesystem.

That's only 1/6th the speed I get out of a SUN 3/160 with two
ST506 drives on an Emulex SCSI controller (measured at 250 to
300 KBytes per second).

Anyway, take heart folks - V6 used a 512  byte transfer size and
could get only about 25 KBytes/second.  System V with its 1 KByte
transfer size gets 50 K - that's a 100% improvement.

	Yours for more amazing technology,
	-Mike O'Dell

PS - "System V - Consider It Standard."