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From: webb@bass.tcspa.ibm.com (Bill Webb)
Newsgroups: comp.sys.ibm.pc.rt
Subject: Re: A question about 6152 running ACIS/4.3
Message-ID: <4015@ibmpa.UUCP>
Date: 13 Feb 90 22:05:00 GMT
References: <90033.203844CWUGC@CUNYVM.BITNET>
Sender: news@ibmpa.UUCP
Organization: IBM AWD Paloalto
Lines: 31

> Hi everybody,
>              A friend of mine has got hold of a core disk (600M+) and
> was able to successfully format it on a model/60 with a RISC card. Now
> having done that wants to be able to use it to run 4.3 off an RT.
> Now my question is, Can he do that ? If so he want to have a maximum
> utilization of the disk. I wish to solicit input from everybody on the net
> on the pro's and cons on doing this. Also I want to know about any hurdles
> if possible
>...
> C Wu

Assuming that it is an ESDI disk and that it otherwise works properly there
shouldn't have to be any changes needed to run 4.3 on the 6152. All ESDI
disks are treated the same by the standalong utilities and the kernel - 
they just have a different number of cylinders. The code already has to deal
with this because the 4.3 partition can be set up with any size that
the user wants.

You should be able to use all of the disk for 4.3 by creating the 4.3 
partition to be the entire disk. I used IBM 300MB ESDI disks by just
plugging them in and using them - so long as the disk you have works 
from a hardware and BIOS point of view 4.3 should be happy with it.

If it is an ST506 disk then things are a bit more complicated an you will
probably have to add an entry in /etc/disktab for the new disk and may have
more problems in getting BIOS to access all of it.

----------------------------------------------------------------
The above views are my own, not those of my employer.
Bill Webb (IBM AWD Palo Alto), (415) 855-4457.
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