W dniu 17.04.2023 o 08:22, Timothy Sipples pisze:
Radoslaw Skorupka wrote:
NO MORE TAPES connected directly to the z/OS. The last physical drive
TS1140 is out of support.
I don't think IBM ever offered any physical tape drives directly connected to
z/OS, i.e. physical tape drives with FICON or ESCON ports on them. The IBM
TS1140 certainly wasn't connected directly. The TS1140 (and its predecessors,
for decades) required a tape controller of some kind for z/OS machine
connection. For the TS1140 it was either a 3592-C07 or TS7600 as I recall.
Do you mean something like "non-virtualized physical tape" perhaps?
[What was the most recent IBM physical tape drive with parallel (bus/tag),
ESCON, or FICON ports on it?]
Timothy,
That's our very old dispute.
My opinion is simple:
1. Every Device is connected through Control Unit.
2. TS1140, 3480, 3420 all were physical tapes physically attached,
because media (cart, reel) was physically 1:1 with MVS volume. Volume
size is just the capacity of the cart/reel. Compression does not change
the idea.
3. Physical drive was equal to logical drive. In VTS world we may have
plenty of logical drives and different number of physical drives.
Back to the topic: TS1140 was the last tape drive which could be used in
a way described above.
If you really insist on different naming, that's your choice. BTW: What
does it mean "non-virtualized"? ;-)
However IBM presentations clearly say about physical tapes and physical
drives. And about LWORM which emulates *physical* tape functionality.
And RMM Logical Tape to Physical Tape mapping. In TS1140 the mapping was
1:1.
Regards
--
Radoslaw Skorupka
Lodz, Poland
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