🚀 go-pugleaf

I posted a request for HD problems earlier.  I also checked with our
local Mac repair guru.  Here is a summary of what I found:

Results from mail in survey:

                could not find |             | could not find |
                40 HD on boot  |  dead 40 HD | 80 HD on boot  | dead 80 HD
                ----------------------------------------------------------
Quantum              14               2             0               1
others                0               2             0               0

* The ones that could not find the 40 HD would usually work after a time
to warm up or after a blow (or firm nudge) was delivered to the disk
(sounds like the, "kick the TV" way of repairing things).

* From what I have heard, the morning boot problems are due to
lubrication (grease) solidifying.  This would explain why warming up
the machine helps.

* *Unfortunately*, someone on the net and our local guru said the
"morning boot" problem often becomes worse until complete failure
occurs.  Thus those 14 "morning boot" problems could slip over into
the "dead 40 HD" column eventually :-(.

* problems occurred with both Mac IIs and SE/30s.

* Our local guru said he has seen *lots* of HD failures (I did not
include his numbers in the above table), but he did not see any
specific patterns (at least not with the Quantums).  He did say that
two different product lines from the same company often had drastic
differences in reliability.  (Maybe the 80 HDs *are* better than 40
HDs).


My conclusions:  Either we have not mastered the technology yet, or we
have a quality control problem.  Can you imagine if our airplanes had a
similar failure rate?

--------------
Todd Heberlein
heberlei@leek.ucdavis.edu	128.120.57.26
heberlei@iris.ucdavis.edu	128.120.57.20



PS. I saw someone else on the net was doing a survey.  If you are
reading this and want some of my data, drop me a line.