"DK" <dk@none.dk> skrev i en meddelelse
news:41e7633a$0$32544$9a6e19ea@unlimited.newshosting.com...
> Er der nogen der ved om et CD-rom drev skriver et unikt ID på CD'en
> - så man kan finde ud af hvilket drev der har brændt CD'en
>
> Hvis det er tilfældet, hvor kan jeg finde dokumentionen.
Fundet på
http://www.cdrfaq.org/ :
Subject: [2-26] Is a serial number placed on the disc by the recorder?
(2004/07/15)
In general, no, but it appears that some stand-alone consumer audio CD
recorders write one. The Recorder Unique Identifier (RID) is a 97-bit code
recorded every 100 sectors. It is composed of a brand name identifier, a
type number, and a drive serial number. Recorders such as the Philips CDR870
write the RID to discourage distribution of copyrighted material.
Windows will show something like "Volume Serial Number is 4365-0FED". There
does not appear to be any way to control this. Some have suggested that the
serial number is generated based on data found on the disc, similar to the
way that audio CDs can (mostly) be uniquely identified by the number and
durations of the tracks.
On floppy disks and hard drives, the "serial number" is generated based on
the date and time when the disk is formatted. The four bytes are:
1.. month + seconds
2.. day + hundredths of a second
3.. high byte of the year + hours
4.. low byte of the year + minutes
5.. (From
www.zdnet.com/pcmag/pctech/content/solutions/uu1508a.htm, which
no longer exists.)
Her er et link til nogen der sælger et cd-analyse program:
http://www.infinadyne.com/cddvd_inspector.html
Det kan også læse RID. Men det nytter ikke hvis der ikke er lavet en RID på
CDen.
Venligst
Tom