Heck - the TI 990 systems (mid 80's) used removable disk
platters on the both the T-50 "system disk" and T-200 "user"
disk drives ... in case of increased error count - simply
change-out a drive platter 'stack' and restore from tape.

I saw that done on several occasions right back there in the
computer room.

Jim



----- Original Message -----
From: "Dale Botkin" <dale@BOTKIN.ORG>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, February 25, 2002 6:56 PM
Subject: Re: [OT]: Hard Drive Crash Recovery



- snip -

> I used to work on mainframes for a living.  Work on, as in with scope and
> wrenches.  The old drives were routinely run for hours exposed to room air
> while servicing.  When the drive is spinning, the surface wind is
sufficient
> to keep dust from landing on the platters anyway.  Granted this was with
> 2400RPM 10-platter IBM 2314's - yeah, I'm old, but not THAT old, it was an
> Army system - but things have not gotten too much worse since.
>
> Dale
>
>

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