"Kent Oldhøj" <wol@oldhoj.dk> skrev:
> Vær opmærksom på at det blot er filinformationen der fjernes, så data
> er ubrugelige. Pladsen bliver ikke frigjort igen før reformatering.
Jo, hvis det er en cd-rw du sletter filer på med f.eks. DirectCD så
får du pladsen tilbage igen, men hvis det er en cd-r formateret med
DirectCD (UDF), så får du ikke pladsen tilbage, men får blot filinfor-
mationen slettet.
»Two kinds of packets can be written: fixed-length and variable-length.
Fixed-length packets are more suitable for CD-RW in order to support
random erase, because it would be daunting (and slow) to keep track
of a large, constantly-changing file system if the packets were not written
in fixed locations. The drawback is that these packets, with a length of
32 kilobytes (as required by the UDF standard), take up a great deal
of overhead space on the disc. The normal data capacity of a CD-RW
disc formatted for writing in fixed-length packets is about 500 megabytes.
Variable-length packets save space, because the size of the packet can
vary with the size of the data being written. This is more useful when
writing to a standard CD-R disc, because these are write-once media,
and it is not necessary to track and allocate free space when files are
'erased'. (Note: On CD-R discs, files cannot actually be erased, but
can be made invisible.)«
<
http://www.roxio.com/en/support/cdr/taodao.html>
--
Med venlig hilsen
Madsen.