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Article #1016

Re: hard disk write protect

#1016
From: cs354- Broward Horne
Date: Wed, 22 May 1991 23:30
37 lines
2336 bytes
In article <9105201340.AA10238@lilac.berkeley.edu> BITNIC IBM-NETS List <IBM-NETS%BITNIC.BITNET@lilac.berkeley.edu> writes:
>
>The reason I was asking without giving any specifics, is that before
>having to go out and getting documents to do the thing, I was wondering
>if there wasn't any system on which it would be easy to do without having
>to get the doc.
>
>For example, because I havn't taken the time to look it up, is there any
>standard on an IDE, SCSI or an AT type controller card for PC's? Does a
>MAC have any signal that's standard on it? Etc...
>
>OR... do I really have to do it on the schematic level of a Hard Disk,
>and there's no way to do it from the controller level?
>
>P.S. Once again, is there a list I can subscribe to that would be a bit
>more suited to this type of question?

          A good place to try might be the Virus newsgroup ( comp.virus,
     I believe ). I couldn't help but notice your system looks like it's
     an Autocad lab or some such. I originally wanted to write-protect
     the hard disks for our Acad lab, but it finally proved to be unfeasible.

     For instance, how about temporary file saves?  To do them to a temp
    directory, or to a user's floppy disk, makes a WORLD of difference to 
    the users.  Just takes too much time.

        There should be a READ/WRITE line to the hard disk, if you can
    get the schematic. Don't forget to tie the end still connected to 
    the drive to either a high or low, depending on which means READ/WRITE.
    A lot of logic chips don't respect a hanging wire as being LOW.

    
-- 
Broward Horne                  Distant lands are not so far away,
horne@sapphire.idbsu.edu       I don't know why *you* don't go.
an030@cleveland.freenet.cwru   Take my hands, I'll show you the way.
                               Pack your bags, and.... sail away. :)
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Message-ID: <1991May22.233037.27047@sapphire.idbsu.edu>
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References: <9105201340.AA10238@lilac.berkeley.edu>

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From: horne@sapphire.idbsu.edu (cs354- Broward Horne)
Newsgroups: comp.protocols.ibm
Subject: Re: hard disk write protect
Message-ID: <1991May22.233037.27047@sapphire.idbsu.edu>
Date: 22 May 91 23:30:37 GMT
References: <9105201340.AA10238@lilac.berkeley.edu>
Organization: Boise State University, Boise
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