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From: paulm@nikhefk.UUCP (Paul Molenaar)
Newsgroups: comp.sys.mac
Subject: Re: Rodime performance with new driver
Message-ID: <433@nikhefk.UUCP>
Date: 21 Oct 88 09:10:06 GMT
References: <431@nikhefk.UUCP> <12214@coherent.com>
Reply-To: paulm@nikhefk.UUCP (Paul Molenaar)
Distribution: comp
Organization: Personal Computer Magazine, Holland  Host: NIKHEFK
Lines: 40

In article <12214@coherent.com> dplatt@coherent.com (Dave Platt) writes:
#In article <431@nikhefk.UUCP> paulm@nikhefk.UUCP (Paul Molenaar) writes:
#> Then I ran Disktimer II, which showed me shocking results. The drive's
#> writing performance decreased dramatically. Now: >660 (whereas
#> the Dataframe list shows something like 55). I knew the Rodime
#> was slower, even with the older driver, but this is terrible...
#
#The figure you're seeing (660 vs. 55) is strong evidence that the drive
#is too fast for the SE at a 1:1 interleave... it's missing sectors on
#every read, and is probably taking 12 revolutions to transfer the data
#rather than 1.
#
#I'm rather surprised that the formatter recommended a 1:1 interleave
#for a drive on an SE.  From what I understand, only a very slow drive
#can be run at 1:1 on an SE without sectors being missed.  Do you recall
#what the formatter said was the actual interleave on the disk _before_
#you reformatted?  I'd bet fairly heavily that the old Rodime formatter
#had laid down a 2:1 interleave.
#
That's true. It was formatted at 2:1 interleave before I took
the installer's advice.

Maybe you should give the people at Rodime a call about this. (it's
too far away for me to call them... I'd have to call in the middle
of the night. I'm dead positive it advised me to format at 1:1.

PS Thanks for the upload!
.
.
.

        Paul Molenaar

	"Just checking the walls"
		- Basil Fawlty -
-- 
        Paul Molenaar

	"Just checking the walls"
		- Basil Fawlty -