Path: utzoo!attcan!uunet!lll-winken!oodis01!uplherc!esunix!blgardne
From: blgardne@esunix.UUCP (Blaine Gardner)
Newsgroups: comp.sys.amiga
Subject: Re: FFS
Message-ID: <1197@esunix.UUCP>
Date: 19 Jan 89 01:52:24 GMT
References: <2114@vu-vlsi.Villanova.EDU>
Organization: Evans & Sutherland Computer Corporation
Lines: 17

From article <2114@vu-vlsi.Villanova.EDU>, by cheung@vu-vlsi.Villanova.EDU (Wilson Cheung):
> 	Under what conditions will FFS afford you no speed gain?  Would
> I gain some speed if I changed the interleave in the high level format?
> You start out with a hard drive that Seagate strictly states must be
> operated at 5 Mbits/sec for proper operation, and somewhere in between 
> we drop to under 20kbytes/sec; come on!

I've got an ST4096 ST506 interface drive hooked to my A2090A. I saw no
measurable difference in performance with different interleave values
(under the FFS). I've never run it under the OFS, so I can't compare any
numbers there, but I get a pretty solid 200-240K/second with Diskperf
(32K buffers).
-- 
Blaine Gardner @ Evans & Sutherland    580 Arapeen Drive, SLC, Utah 84108
Here: utah-cs!esunix!blgardne   {ucbvax,allegra,decvax}!decwrl!esunix!blgardne
There: uunet!iconsys!caeco!pedro!worsel!blaine
"Nobody will ever need more than 64K."    "Nobody needs multitasking on a PC."