🚀 go-pugleaf

System: RT/PC with AIX version 2.1.2

The RT cartridge tape is able to read either QIC-11 or QIC-24 tapes,
both using /dev/rmt0.  This is no small achievement; I know of very
few other systems that can read both, and all the ones I know of at
least require you to use different device names (thus different major
and/or minor numbers) for the two different formats.  The RT seems
to check the first block on the tape, and figures out for itself what
kind of tape it is reading.

However, I have not been able to figure out how to write a QIC-11
tape.  The default is apparently QIC-24, and I can't find any way to
change or override that.  The manual(s) (User Reference, Technical
Reference) are very quiet about this.  In fact, they don't even
mention that it can read either format.  I've tried lots of different
minor numbers, still with major number 10, with no luck.  I'm not
brave or foolish enough to blindly try different major numbers.

Has anyone else discovered how to write QIC-11 tapes?

jw