[cctalk] Re: Disk pack production tools

[P Gebhardt via cctalk]

Am Montag, 16. Januar 2023 um 17:57:46 MEZ hat Chuck Guzis via cctalk 
<cctalk@classiccmp.org> Folgendes geschrieben: 

Hi Chuck, 

>The 844 drives date from the early 70s.  I worked for CDC on a military
>project where these were brought in to replace the 821s that were bid
>(yes, I know there's no information on those--they're essentially a
>high-capacity unit build on an 808 chassis and unreliable as hell).  A
>typical installation might have used over 100 of the units on a 4-CPU
>Cyber cluster.  They worked well, unless one got a bad pack, which would
>clobber the heads on a drive; using the drive on a new pack would result
>in creating another head-clobbering pack.   I recall an overnight report
>issued by an operator where he succeeded in trashing several packs and
>multiple drives in his attempt to get something to work.  It was a
>blow-by-blow report somewhat akin to the Gerard Hoffnung bricklayer story.

Wow, thanks for sharing this story!
Did the 844 drives have the same hydraulic-actuator approach like the MMD 841 
drives?

Greetings, 
Pierre


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