On Mon, 3 May 2021 12:38:02 +0000, Seymour J Metz wrote:
>There is a dispute on wikipedia as to the definition of DASD and whether IBM
>still uses the term. I'd like references, preferably on the hardware side, for
>use of the term on i, p and z. Thanks.
>
Not hardware, not i, not p, but: z/OS Version 2 Release 4
DFSMS Using Data Sets
IBM SC23-6855-40
Direct Access Storage Device (DASD) Volumes
Although DASD volumes differ in physical appearance, capacity, and
speed, they are
similar in data recording, data checking, data format, and programming.
The recording
surface of each volume is divided into many concentric tracks. The
number of tracks
and their capacity vary with the device.
Some decades ago, "similar in data recording" was unambiguous. Today,
does it encompass flash, magnetic, ...?
And does "surface" refer alike to ferrite and silicon?
Does "concentric" exclude drum and data cell?
What about zFS?
Who gets to submit the RCF?
-- gil
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
