Article View: comp.sys.mac
Article #25763Re: A/UX disk I/O (real numbers)
From: W. Harry Plantinga
Date: Sun, 28 Feb 1988 20:28
Date: Sun, 28 Feb 1988 20:28
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>> Amiga Amiga Mac-II Sun >> Floppy CLtd A/UX 3/50 >> >> Read speed, 512 buffer (byte/sec) 11014 17133 55168 240499 >> Read speed, 4096 buffer (byte/sec) 12024 17133 53708 234057 > >Under the MacOS on a MacII configured with an 80 MB CMS Pro80ii (Quantum) >disk drive, I get a read speed of about 512 Kilobytes per second >using a buffer (not cache) size of 32 KB (see PBOpen in IM or setvbuffer() >under MPW C), while reading an unfragmented 8+ Megabyte file. Let me see if I have this straight. The mac II hardware (without DMA) is capable of reading data off the hard disk at 512Kb/sec, compared to the sun 3/50 (with DMA), which reads data at 240Kb/sec? Wow!
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!labrea!aurora!eos!ames!husc6!uwvax!speedy!planting From: planting@speedy.cs.wisc.edu (W. Harry Plantinga) Newsgroups: comp.sys.mac Subject: Re: A/UX disk I/O (real numbers) Message-ID: <5314@spool.cs.wisc.edu> Date: 28 Feb 88 20:28:18 GMT References: <8802251936.AA23485@cory.Berkeley.EDU> <7215@agate.BERKELEY.EDU> Sender: news@spool.cs.wisc.edu Reply-To: planting@speedy.cs.wisc.edu (W. Harry Plantinga) Organization: U of Wisconsin CS Dept Lines: 17