12 Dec
2014
12 Dec
'14
12:45 p.m.
On 2014-12-12 18:29, Chuck Guzis wrote:
On 12/12/2014 09:10 AM, Johnny Billquist wrote:
You mean old OSes...? :-)
Two tape marks is just a convention used by some
software to indicate
the logical EOT. It has no special meaning for the hardware. In fact,
standard ANSI formatted tapes can legally contain two consecutive tape
marks without it being the EOT. ANSI instead have a special record to
indicate EOT.
Old tapes are extremely variable on their use of ANSI labels, so when
archiving, I'll read as far as possible (i.e. either to EOT or a "blank
media" exception. And then there's Unix/Linux and many other OSes
that don't give a fig
about ANSI labels.
Even for OSes that do give a fig about ANSI labels, they are not the
bible. You can read the tapes without using that layer on any OS...
It's just another layer you can use in between, to give some more structure.
Johnny