Am 08.03.2015 um 04:18 schrieb Ed Greshko:
I err'd when I wrote the above as I actually found 2 DVD's in the drawer and the one I used was an off-brand from "Melody Group" here in Taiwan and blanking worked.
The Philips brand DVD+RW does *not* support the "blank" option when using the dvd+rw-format tool...
[egreshko@meimei ~]$ dvd+rw-format -blank=full /dev/sr0
- BD/DVD±RW/-RAM format utility by appro@fy.chalmers.se, version 7.1.
- 4.7GB DVD+RW media detected.
- illegal command-line option for this media.
I found the dvd+rw-format man page quite readable (unlike some others) and helpful in explaining the difference between DVD-RW and DVD+RW media with respect to blanking/formatting:
<quote> To blank a DVD-RW and put in the incremental sequential mode, run: dvd+rw-format -blank=full /dev/dvd ...
-force[=full] Perform formatting even if the medium is formatted already. This is not recommended for BD-RE and DVD+RW media, since they need to be formatted only once. Use -format=full to perform full (lengthy) reformat in case of DVD-RAM ... ...
Note that DVD+RW re-formatting procedure does not substitute for blanking. If you want to nullify the media, e.g. for privacy reasons, do it explicitly with 'growisofs -Z /dev/dvd=/dev/zero'. </quote>