From: ldo@nz.invalid

On Wed, 17 Dec 2025 19:08:24 -0600, John H. Reinhardt wrote:

> On 12/17/2025 6:53 PM, Arne Vajhøj wrote:
>>
>> Google indicate that RA60's become DJ disk. Not sure why. I am not
>> old enough to know RA60's. Maybe someone else can elaborate on why
>> RA60's are DJ and not DU.
>
> Because they were removable pack disks.

I never understood the DEC disk naming scheme. Which were DJ and which
were DK? Which ones were “removable” disks, and which ones were
“cartridge” disks? Why did DX floppy drives become DY just because of
the double density or double sides (I forget which now)? How did they
pick letters for DM, DR, DU drives etc? Didn’t all the model numbers
begin with R, anyway?

Lawrence
still trying to figure out why some USB-serial devices appear on Linux
as ttyUSB, and others as ttyACM

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