Text 14328, 121 rader
Skriven 2006-01-03 12:56:01 av George Vandervort (1:382/8)
  Kommentar till text 14326 av Jay Emrie (1:123/140)
Ärende: Crash !
===============
Hello Jay!

I agree with you for the most part..

Tuesday January 03 2006 10:56, JAY EMRIE wrote to GEORGE VANDERVORT:

 GV>> Monday January 02 2006 21:54, CHARLES ANGELICH wrote to GEORGE
 GV>> VANDERVORT: Hello George - --8<--cut As for Freezing a Bad hard
 GV>> drive, that crashes when it gets HOT.. Where does this all come
 GV>> from ? Who was wise enough to note this in the first place ? I had
 GV>> never heard of this before. This Technueq was Very popular 25 years
 GV>> ago, before IDE Hard drives were invented, back then MFM Drives and
 GV>> 5.25" 10 lbs Hard drives were very good at Generating lots of Heat
 GV>> Hot enough to melt the Sodder Connections on the HD Circuit board,
 GV>> and Freezing the HD Stableized the Sodder long enough to Boot up
 GV>> the HD and salvage some of Data.. No. This was an attempt to break
 GV>> 'stiction' of the heads from the platters. It had nothing to do
 GV>> with solder.
 JE>
 GV>> I'm Sorry to disagree with you on this one..
 GV>> Stiction was an intirely different problem.
 JE>
 JE> 100% correct.
 JE>
 JE>
 GV>> IMHO, Freezing a HD with Stiction would not work well
 GV>> because Freezing the HD would solidify the Lubricant
 GV>> that caused the Stiction problem in the first place.
 JE>
 JE> Also 100% correct
 JE>
 GV>> I fought Stiction problems also..
 JE>
 GV>> Early SEAGATE HD were manufactured with a
 GV>> poor quality Lubricant that leaked out onto
 GV>> the Platters and Read/Write heads when it
 GV>> heated up, and would Gell when cooled off
 GV>> when the Computer was shut down or went into
 GV>> Hibernation.
 JE>
 JE> I was under the impression that the lubricant was actually applied to
 JE> the platter surfaces during manufacture to lessen the possible head to
 JE> platter damage during start up and stopping.

I ran a BBS 24/7 for 18 years or so
from the late 70's until 1996 or so
and went thru 40 or 50 hard drives in that time period,
most of the MFM drives lasted about 4-6 months,
I used 4 HD at a time..

Not all the Seagate HD's that I used had the
stiction problem, and some were Replace under Warranty..

A Tech Support responce that I got was that HD
were Assembled Manually at that time, and that
the Lubricant was in the Spindle that the Platters
were attached to, and many of the Hub Spindles conntained
too much Lubricant and would leak out onto the Platters
and onto the Heads, when over heated..  ??


 JE>
 GV>> The Gelled Lubricat would Stick the platters
 GV>> together, or even more damaging, the Gelled
 JE>
 JE> Whoa! How on earth would platters stick together?
 JE> Multiple platter HDs had RW heads BETWEEN the platters - remember?
 JE> Heads sticking to platters - you betcha!
 JE>

Hmmm.. I guess it depended on the Amount of
Lubricant that leaked out between the Platters??

 GV>> Lube would Stick the Read/Write Heads to the
 GV>> Platter and Booting the computer or trying to
 GV>> access the HD with Stiction could dammage
 GV>> Some DATA on the Plater where the
 GV>> Read/Write Head was stuck..
 GV>> On some Early HD you had to Park the
 GV>> Read/Write Head before shuting down the computer
 GV>> to keep the Read/Write Head from laying
 GV>> on the Platter over some Data area..
 JE>
 JE> Correct - there were "parking" routines for that.
 JE>
 JE>
 JE>
 GV>> The ONLY two Practical solutions to Stiction was:
 JE>
 GV>> 1.) Leave the Computer ON 24/7 as most BBS
 GV>>    Sysops were prone to do, or
 JE>
 GV>> 2.) Replace the HD with a different Brand HD
 JE>
 JE> Well, there was one other sometimes solution:
 JE> Bang on the side of the computer case on startup!
 JE>
 JE>
 GV>> Seagate HD in the Late 1970's and early 1980's
 GV>> seemed to be the primary HD with Stiction..
 JE>
 JE>
 JE> Jay
 JE> -+-
 JE>  þ OLXWin 1.00a þ If a mute swears, does his mother wash his hands
 JE> with soap?
 JE>  + Origin: Try Our Web Based QWK: DOCSPLACE.ORG (1:123/140)


Regards,
George Vandervort
InterNet EMail: georgev@austin.rr.com
Tech Support: http://home.austin.rr.com/llr/tech.html

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