IBM 4331 Mainframe

Guy Sotomayor Jr ggs at
Mon May 1 12:57:44 CDT 2017

> On May 1, 2017, at 10:49 AM, Bill Gunshannon <bill.gunshannon at> wrote:
> Just hope you don't have a head crash.  Had one when I was at Ft.
> Ben Harrison (a long time ago, when the 4341 was just going into
> production. We had one of the first!) and it sounded like the building
> was coming down.  Hate to think the effect it would have on your
> neighbors.  :-)

The 3340 drives are winchester pack drives.  So the heads are in the packs themselves.
A head crash means that the pack is toast (but it is usually) but doesn’t render the drive
inoperable (just put in another pack).

TTFN - Guy

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