How can AIX tell 1/4" cartridges apart?

[Andreas Siegert]

olson at newmedia.esd.sgi.com (Dave Olson) writes:

>The drive itself will refuse to write the wrong type of tape (normally
>QIC24).  Now the interesting thing is that QIC120 (i.e., 600A) tapes are
>normally writable on a QIC150 drive...  So what is the scoop; is IBM using
>a QIC150 only drive, or are they programming the drive to run in only
>QIC150 mode?

When reading it does not matter, but when writing you have to specify the 	
density with rmtx.Y where an Y >= 4 specifies QIC 120, else QIC 150 is
assumed.

--
Andreas Siegert             IBM Deutschland GmbH    Voice: +49 89 7670-509
AIX Field Support Center    Pocci Strasse 11        Fax:   +49 89 7670-555
siegert at ibm.de              D-8000 Muenchen 2   
All opinions expressed are my own and not an official IBM Statement!