Re: Can't write to DVD+R?

From: Dances With Crows (danSPANceswitTRAPhcrows_at_usa.net)
Date: 01/03/04 

Date: 3 Jan 2004 01:33:18 GMT

On Sat, 3 Jan 2004 00:58:56 +0000 (UTC), Bill Unruh staggered into the
Black Sun and said:
> somebody <some@body.com> writes:
> >I have a script which uses growisofs to write files to a DVD+RW with
> >no problems. The script will not work with a DVD+R disk, and
[snip]
> A CD+R CANNOT be added to. Once you have written to it, the game is
> over. It is written. That is why it is called DVD+R ratehr than
> DVD+RW. The W means write. The CD+R is a "write one, read many

Um. There's no such thing as a CD+R AFAICT. A CD-R can be written to
many times; you use cdrecord and mkisofs's multisession support.

Data that has already been written cannot be erased, of course, but you
can append data to an already existing CD-R that hasn't been finalized,
had the initial session burned with -multi, and has some free space left
on it. Multisession burning introduces overhead though, and only the
last-burned session is visible when you mount the CD-R in the usual
way--you have to pass the session= parameter to mount to mount other
sessions *until* you finalize the CD-R by not passing the -multi option
to cdrecord. Then all the sessions you burned should be visible.

DVD+Rs are the same way. You use "growisofs -Z /dev/dvd+r ..." to burn
the first session, and "growisofs -M /dev/dvd+r ..." to burn subsequent
sessions. Works OK here. YMMV. HTH, 

-- 
Matt G|There is no Darkness in Eternity/But only Light too dim for us to see
Brainbench MVP for Linux Admin /    mail: TRAP + SPAN don't belong
http://www.brainbench.com     /                Hire me! 
-----------------------------/ http://crow202.dyndns.org/~mhgraham/resume

Relevant Pages

  • Re: excel backup question
    ... The information is not retrievable until that index is written to the CD-R AND the CD should not be removed from the drive until the session is closed. ... Since opening the tray allows the user to change which disk is in the drive, any disk that is ejected before the session closure may be deemed PERMANENTLY unusable by the CD-R writing software. ... Packet writing software maintains its index as the disk contents change instead of waiting for a irrevocable single session closure process. ...
    (microsoft.public.windowsxp.general)
  • Re: cd burning question
    ... Has anyone experienced the cd-r not playing in their mp3 player? ... same disk, which won't play in the mp3 player... ... only the first session ... all media is present on the disk and plays on the pc. ...
    (microsoft.public.windowsxp.general)
  • Re: Question Re: saving to CD-R
    ... By default, if you use the Windows CD-Writing Wizard, it will use ... This allows you to "overwrite" files on a CD-R ... by not closing the session on a CD. ... You aren't really overwriting the ...
    (microsoft.public.windowsxp.basics)
  • Re: cd burning question
    ... Third-party burners for CD-R typically suggest finalizing the ... _session_ so that a later session can import the earlier one and add ... Wizard finalizes the _disc_ and doesn't know how to deal ...
    (microsoft.public.windowsxp.general)
  • pam_sm_close_session doesnt run without privilege seperation
    ... I've got pam_mount set up mostly with openssh. ... it'll mount fine, the pam_sm_open_session function gets called (as ... But when I exit the session, pam_sm_close_session gets called, but it ... But without privilege seperation, I get nothing. ...
    (SSH)