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From: alan@shodha.dec.com ( Alan's Home for Wayward Notes File.)
Newsgroups: comp.sys.dec
Subject: Re: HSC70: mixing Ultrix and VMS, restricting access to disks.
Summary: Ultrix and VMS on the same Star coupler.
Message-ID: <450@shodha.dec.com>
Date: 16 Oct 89 22:37:53 GMT
References: <25398b6132a@vms.huji.ac.il>
Organization: Digital Equipment Corp. - Colorado Springs, CO.
Lines: 29

In article <25398b6132a@vms.huji.ac.il>, YEHAVI@vms.Huji.AC.IL writes:
> 
>   We are running a VAX-6300 with HSC70 to control the disks. We are now
> considering connecting one of the MIPS machines (5800 series) to the HSC.
> Now, there are two questions:

> 1. Is it possible at all? (ofcourse each will use different disks). Our
>    salesman says it'll work.

	It's not a supported configuration.  On the other hand I've
	heard that it works.  Be careful if you try though.

> 2. A more general question: Is it possible to limit inside the HSC access to
>    some disks for some hosts; i.e.: disk 0 to 7 will be access only by host A
>    and disks 8 to 10 only by host B? I couldn't find anything in the
>    HSC manual, so is it impossible?

	There is no way to limit access to a disk within the HSC.
	There isn't a good way to limit VMS's access to the Ultrix
	disks.  I think you can SET DEVICE/NOAVAILABLE, but as soon
	as the VMS node reboots it will see them again.  From the
	Ultrix side it's easy to just not configure the VMS disks.
>                                        Thanks in advance,
>                                                 __yehavi:
> Yehavi Bourvine


-- 
Alan Rollow				alan@nabeth.enet.dec.com