Back in my days as a computer tech at a small VAR here in Vancouver,
we had an order for equipment for a kiosk type application. The
customer insisted on write protecting the drives, so we found some
Quantum SCSI disks that had a small jumper on the drive labelled "WP"
Once that was shorted, you could not write at all to the disk. I
don't know if there are any drives being made now that have the same
feature, but I have seen it out there.
Regards,
Cam.
--__--__--
Message: 4
Date: Fri, 28 Sep 2001 13:50:50 -0700 (PDT)
From: Jeff Newmiller <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
cc: LEAF list <[EMAIL PROTECTED]>
Subject: RE: [Leaf-user] Floppys
On Fri, 28 Sep 2001 [EMAIL PROTECTED] wrote:
> A bit off topic.
>=20
> Some time ago I've read about write protecting a hard disk.
> This was done via tweaking with the IDE cables, if I=B4m not wrong you ju=
st cut
> one of the
> cables, insert an on/off switch an voila!!!
> Problem is... I can't remember where I have seen that!!!!
>=20
> Does anybody knows about this??? It would be perfect to have a "write pro=
tected"
> hard disk!!!!
Sorry to disapoint you, but it is physically impossible to read from an
ide (or scsi) hard disk if any signal wires have been cut in the ribbon
cable. I know it sounds like it "ought to work" but it won't, because the
hard disk read-write registers have to be written to in order to give the
command to read some data. I doubt that any type of hard disk interface
would support such hardware interference with usable results.
I can hope that someday, this false rumour will be laid to rest. =20
Unfortunately, with the long memory of incomplete web archives I guess
that will be about the same time people stop believing the Email tax is
now being debated in Congress, and that Microsoft is paying people to pass
on chain letters.
There _are_ rare hard or flash disks with built-in write protect switches,
but that is a function unrelated to the interface cable signals.
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