Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!network!sdcsvax!ucsdhub!hp-sdd!hplabs!hp-pcd!hplsla!hpubvwa!apl-em!dunlap
From: dunlap@apl-em.UUCP (John Dunlap)
Newsgroups: comp.sys.hp
Subject: Re: allocate/deallocate command wanted
Message-ID: <630008@apl-em.UUCP>
Date: 9 Aug 89 16:23:30 GMT
References: <210024@speclab.bgp-usgs.gov>
Organization: Applied Physics Lab, UW, Seattle WA
Lines: 22

>What happens if somone else writes to the tape while I am writing?  
>What happens if my job has just finished,
>and someone else starts writing--they write on my tape!

One can unload the tape as soon as the writing is finished.
I usually have a three line script that 
	1. writes the tape
	2. reads the tape to make a table listing
	3. unloads the tape

I wonder what does happen when two programs write to the same tape
simulateously.  To my knowledge we have not had that happen in 5 years
on three machines.

We run the plotters on the spooler with the device file owned by
the "lp" user.

Masscomp does have an allocate for the tape drive.

John
dunlap@apl-em.apl.washington.edu
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