ADSM-L

Re: How Do I Add a /dev/mtX 8mm Tape Drive?

1994-12-14 02:54:28
Subject: Re: How Do I Add a /dev/mtX 8mm Tape Drive?
From: Roy Jaques <rjaques AT BCOPS1.ESTEC.ESA DOT NL>
Date: Wed, 14 Dec 1994 08:54:28 +0100
> >> All of our 8mm tape drives on all of our RS/6000s are defined as
> >> /dev/rmt0.  The ADSM Administrator' Reference (page 96), referring
> >> to the DEFINE DRIVE command says "For 8mm tape drives, you must
> >> specify the device name having the form /dev/mtX....  DO NOT enter
> >> a device name that has the form /dev/rmtX."  Is there a secret way
> >> to get AIX to define an 8mm drive as "mt" instead of "rmt"?
> >>
I agree its not in our manuals either but its not a secret to IBM.

> >There is, I ran into the same problem a little while ago. I thought I could
> >fix it by defining an mt device by hand, using mknod, but that was not the
> >trick.
> >By accident I was playing around in SMIT and suddenly I discovered that I had
> >created some mt devices ..... guess what, you have to set the blocksize to
> >1024. We always set it to 0 (variable blocksize), which appears to only 
> >create
> >rmt devices !
> >
> >..Victor
> >
We used the EXB 8500 description here at the suggestion of IBM in Utrecht. It
works but it took quite a while to get answer.

I would be interested in finding out what support for ADSM is like in other
places outside the US time zones.

Roy Jaques
BCS Technical Support
ESTEC, Noordwijk, The Netherlands
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