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From: keith@Apple.COM (Keith Rollin)
Newsgroups: comp.sys.apple
Subject: Re: GS/OS - SCSI question
Message-ID: <24446@apple.Apple.COM>
Date: 21 Jan 89 02:25:27 GMT
References: <[ECLA.USC.EDU]19-Jan-89.09:54:54.BHUBER>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 32

In article <[ECLA.USC.EDU]19-Jan-89.09:54:54.BHUBER> BHUBER@ecla.usc.edu writes:
>Now that GS/OS is out, one of the reported advantages is lifting the 32 MB
>hard disk limit.  Two questions result from this statement:

Well...yes and no. GS/OS is just the supervising OS, as it were. It relies on
the existance of File System Translators to perform the mapping of blocks and
files to the way they are laid out on the disk. Two such FSTs are ProDOS and
High Sierra (for CD-ROMs).

With this distinction in mind, then GS/OS supports up to 4 gigabyte volumes,
but is limited by the still existing 32Meg limit of the ProDOS FST.

>1. Can a CMS 60 MB hard disk, currently configured as two 30 MB partitions,
>be reconfigured (with loss of data, of course) as a single 60 MB volume?

Not if you want to use it for ProDOS storage.

>
>2. Can an Apple 20 MB SCSI hard disk and a CMS 60 MB SCSI hard disk both be
>serviced from a single SCSI controller card?  If not, why not? If yes, does
>it matter which brand controller card (Apple's or CMS's)?
>
You should be able to if your CMS drive can run off of Apple's SCSI card with
the Rev C ROM. I don't have any experience with those drives, and can't
remember is they do.


Keith Rollin  ---  Apple Computer, Inc.  ---  Developer Technical Support
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