Article View: comp.sys.mac
Article #9230Re: Quantum ROM fix report
From: Peter Espen
Date: Sun, 10 Dec 1989 00:16
Date: Sun, 10 Dec 1989 00:16
60 lines
2720 bytes
2720 bytes
In article <37039@apple.Apple.COM>, hardie@Apple.COM (Robert H. Tankersley) writes:
>
> I am not authorized to make any statements for Apple. But I work for them
> and might be able to shed some light.
>
>
> I also understand that tests have been performed that show that the new PROMs
> do not result in a performance change nor do they affect durability.
>
> This is what I have heard from Apple. But I have not been involved in any
> testing or development of the fix. I'm just a simple field person.
>
WOW!! You mean Apple even lies to it's own employees!!!
The new ROM certainly DOES degrade performance of th Quantum drive!
I've had the new ROM installed on my Quantum 80 meg for 3 months now. The drive is still doing exercise routines at random times.
The info in the following graph was generated by "SCSI Evaluator 1.01" and
clearly shows the amount of performance degradation that takes place when
my 80 Meg Quantum with the new ROMS is doing it's "exercise routines".
The normal data was taken when the drive was acting normally, and the degraded
data was generated while the new ROM routines were taking place. Remember that
these exercise routines occur at random times, and can sometimes go for a
long time. NICE "FIX", HUH!!!
View the following graph using Monaco 9 point......
20000 |#######
| # # = NORMAL PERFORMANCE
18000 | # * = DEGRADED PERFORMANCE
| #
16000 | # VERTICAL SCALE = KBITS/SEC
| #
14000 | # HORIZ. SCALE = TRANSFER SIZE (K)
| #
12000 | #
| #
10000 | #
| #
8000 | #
| #
6000 | ##################################
|
4000 |
|
2000 | ***********************************************
|***
|____________________________________________________
10 15 20 25 30 35 40 45 50 55 60
This should make things pretty clear!!
Peter Espen
espen@well
Technical Details
Message-ID:
<14887@well.UUCP>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!zaphod.mps.ohio-state.edu!usc!apple!well!espenReferences:
<14618@well.UUCP> <9323@batcomputer.tn.cornell.edu> <37039@apple.Apple.COM>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!zaphod.mps.ohio-state.edu!usc!apple!well!espen From: espen@well.UUCP (Peter Espen) Newsgroups: comp.sys.mac Subject: Re: Quantum ROM fix report Summary: Complete mis-information Keywords: quantum Message-ID: <14887@well.UUCP> Date: 10 Dec 89 00:16:28 GMT References: <14618@well.UUCP> <9323@batcomputer.tn.cornell.edu> <37039@apple.Apple.COM> Lines: 60