I was just looking back on the SYSGEN install output I saved, and read this …
The RSTS/E system is distributed on magtape; RK05 (DK), RL01 (DL), and RK06 and RK07 (DM) cartridge disks; or may already have been transferred to the system disk (SY).
For magtape, a distinction must be made between
the TU10, TE10, and TS03 drives, which use the device name “MT”;
the TU16, TE16, TU45, and TU77 drives, which use the device name “MM”;
and the TS11 drive, which uses the device name “MS”.
So three different device drive prefixes TU, TE and TS…
And three different device name prefixes MT, MM and MS
But any device drive can belong to any device name…
TU10 drive use device name MT
But TU16 and TU77 drives use device name MM
And…
TE10 drive uses device name MT
but…
TE16 drive use device name MM
Oh, and lets not forget…
TS11 drive uses device name MS
but…
TS03 use uses device name MT
Not confusing…at all! Riiiiiiiiiiiiight!!!!!
Looking back I can see I…
att -f tu0 CUST-TAPE-1000.aws from simh
and I used the device name MM (in RSTS/E) which was correct…by chance
I also did show tu0 which said…
TU0 attached to CUST-TAPE-1000.aws, write enabled, TE16
And I now know that a TE16 uses the device name MM
But…at the time it was totally a guess. So the simh command show <device> is very important because it lets you know what you should use for the RSTS/E device name prefix!