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Checksums, etc. was Re: One Time Pads $5000|Cheap
In message Sun, 12 Dec 93 10:14:22 EST,
[email protected] (Bill Bogstad) writes:
> Another problem is even if
> the media itself has this capability the standard writer devices are
> going to want to write block checksums etc.; which is probably going to
> fail.
A few years back I was into WORM disks for imaging systems. We needed to be
able to burn an image on the disk, and then go back and set a "logical
deletion" flag so that the records would no
longer be accessible.
The standard WORM device controllers wouldn't let it happen. They insisted
on verifying the checksums on the block. We considered hacking the
controller logic, but gave up as too much of a maintanance headache.
But even WORM medea are rewritable at a low enuff level.
Pat