The 4331 had an internal diskette drive (accessed from the top of the
cpu) that emulated a 3540. It was the same drive as used for IML. We
also had one attached to our System-3/15D.
Tony Thigpen
R.S. wrote on 5/13/20 10:55 AM:
Excuse me, what is IBM 3540?
This is mainframe forum so I checked all historical DASD, including drum
device and 2305 (which is not a drum) and found no such device. I also
reviewed disks for small systems (S3 System 32, System 34... AS/400) and
still no such device. Finally I found ~500MB SCSI attached 3,5" disk
with such number.
However I still don't know what is 3540. Any clue?
Update: I found it. It is diskette (yes, 8" floppy diskette drive).
Where can I find the reference about it? In new shining z/OS 2.4 JCL
Reference!
Wow!
So, I dare to ask about this "still supported" device:
Was it Bus & Tag attached?
What parameters has the diskette? capacity, cylinders #, track length...
How it was recognized by operating system? Was it another DASD volume?
Every diskette was separate volume as tape cart?
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