Non zero LUN on an HSZ based TZ89 : How to create the tape device special file names

From: <anthony.miller_at_vf.vodafone.co.uk>
Date: Wed, 19 Apr 2000 11:03:09 +0100

Hi...

I'm asking this on behalf of a colleague. I have searched the archives but
cant see anything similar:




For hardware reasons that I wont go into, we are in the position of having a
TZ89 drive connected to an HSZ70 which has the unit number P401. i.e.., a
non zero LUN.

We have another TZ89 in the same HSZ70 which has unit number p400. The
device special file creates just fine with a ./MAKEDEV tznnn (where nnn is
bus*8 + 4). We can access the tape ok.

However, if we try to do a ./MAKEDEV tzbnnn (i.e.., the 'b' for the LUN of
1), the MAKEDEV fails (I don't have the FAILURE error message to hand).

Have had a quick look thru the HSZ70 manual but cant see anything relating
to this - obviously MAKEDEV is a DUNIX feature and seems not to be discussed
in the HSZ manuals.

The question is - is a non zero LUN for a tape device supported? If so, how
do we create the tape device special files?

We don't have the option of changing the unit number to that with a non zero
LUN as all non zero unit numbers are already in use.




Thanking you in anticipation.

regards - Tony Miller
Received on Wed Apr 19 2000 - 10:04:41 NZST

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