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From: d87-jmf@sm.luth.se (Jim Malml|f)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Seagate interleave and A2091
Message-ID: <975@tau.sm.luth.se>
Date: 27 May 90 16:43:37 GMT
References: <1956@esunix.UUCP> <11742@cbmvax.commodore.com> <1758@tmiuv0.uucp> <23337@uflorida.cis.ufl.EDU>
Organization: University of Lulea, Sweden
Lines: 37


I have an ST157N-0 installed in my A590 (basically the same
controller as the A2091) and when using diskspeed 3.1 I was
getting higher write rates then read rates (write 500k/s,
read 480 k/s) so I tried to change the interleave by poking
around in the drive definitions file and then do low level
formating in HDToolBox. This didn't work so after some hours
of testing and some reading in magazines I thought of using
diskperf instead of diskspeed . So after resetting the drive
definition file to normal and low level formating and finally
restoring all files on my harddisk (about 17Meg) I ran diskperf
from fish 187. This is the result:

File create/delete:    create 10 files/sec, delete 18 files/sec
Directory scan:	    96 entries/sec
Seek/read test:	    52 seek/reads per second
r/w speed: buf 512 bytes, rd 26568 byte/sec, wr 23037 byte/sec
r/w speed: buf 4096 bytes, rd 100182 byte/sec, wr 83110 byte/sec
r/w speed: buf 8192 bytes, rd 140748 byte/sec, wr 123604 byte/sec
r/w speed: buf 32768 bytes, rd 332881 byte/sec, wr 174278 byte/sec
r/w speed: buf 131072 bytes, rd 503316 byte/sec, wr 277156 byte/sec
r/w speed: buf 524288 bytes, rd 551882 byte/sec, wr 332881 byte/sec

(On partition dh0: 405 cyls )

So there seems to be some problems with diskspeed. I just thought
I should warn about this problem so that all using this combination
test this before rushing away and format the disk with another
controller.

My configuration is:
A500 with kick 1.3 and MC68010 and totally 3Meg memory.

/Jim

===================================================================
Jim Malmlof 			E-Mail:tau.sm.luth.se