Does anyone/museum test disk packs?

Paul Koning paulkoning at
Thu Mar 17 08:27:22 CDT 2022

> On Mar 16, 2022, at 10:28 PM, Chris Zach via cctalk <cctalk at> wrote:
>> I vividly recall a log by an operator who had a bad CDC 844 pack who
>> proceeded to destroy 5 drives and 3 additional packs. It was detailed
>> enough that it read like Gerard Hoffnung's "Bricklayer's Story".
> When I was testing one of my RL02 drives I had a head skid on the disk. Problem was the air filter was so clogged there wasn't enough air to allow the heads to fly.

Huh?  The way I've always understood it is that heads fly from the air entrained by the disk surface as it spins, not from air blown through the drive via the air filters.  And clearly that is true for modern drives, since they are sealed.


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