8 Apr
2021
8 Apr
'21
8:34 a.m.
On 4/8/21 12:23 AM, Eric Smith wrote:
On Wed, Apr 7, 2021 at 2:33 PM Chuck Guzis via cctalk
<cctalk at classiccmp.org <mailto:cctalk at classiccmp.org>> wrote:
Okay, I've got a WORM disc here--how do they propose to archive that?
(recall that unwritten sectors can't be read).
There's a big difference--in a WORM, unwritten sectors *mean* something.
Recall that you can't ever re-write or erase data. The read/write
filesystems are "interesting" and use the presence or absence of data as
part of the picture.
Just unraveled one such filesystem--it's interesting. You never lose
information.
Consider that, on a sector basis, there are three possibilities for the
value of a bit.
--Chuck