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2 messages
2 total messages Started by Jean-Serge Gagnon Mon, 20 May 1991 13:26
hard disk write protect
#1006
Author: Jean-Serge Gagnon
Date: Mon, 20 May 1991 13:26
32 lines
2113 bytes
Thanks Valdis...

I am very much aware that the solution will vary from one system to the
next, especially in the environment that I currently work.

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?

Thanks again.

 _______________________________________________________________________
|                                                                       |
|            Jean-Serge Gagnon <JSG8A@ACADVM1.UOTTAWA.CA>               |
|___________________________________ ___________________________________|
|                                   |                                   |
|         Specialiste en Equipement | Computer Hardware                 |
|                      Informatique | Maintenance Specialist            |
|               Universite d'Ottawa | University of Ottawa              |
|                    (613) 564-7813 | (613) 564-7813                    |
|___________________________________|___________________________________|
Re: hard disk write protect
#1016
Author: 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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