Hi, pe...@easthope.ca wrote: > Drive type : vendor 'PLEXTOR' product 'DVDR PX-708A' revision '1.06'
How old is it ? I find this model mentioned as early as 2003. DVD burning was a novelty back then. > https://www.londondrugs.com/verbatim-dvd-rw---30-pack/L7011505.html Says "You have been blocked". Guessing from the URL: DVD-RW media. I would avoid DVD-RW with an old DVD burner. After DVD+R DL this is the next type of DVD which fails when the burner's sight becomes blurred by age. The internet says that PX-708A does DVD-R, DVD-RW, and DVD+RW. You may ask it by xorriso -outdev /dev/sr0 -list_profiles out A modern DVD burner is supposed to reply something like Profile : 0x0012 (DVD-RAM) Profile : 0x0011 (DVD-R sequential recording) Profile : 0x0015 (DVD-R/DL sequential recording) Profile : 0x0016 (DVD-R/DL layer jump recording) Profile : 0x0014 (DVD-RW sequential recording) Profile : 0x0013 (DVD-RW restricted overwrite) Profile : 0x001A (DVD+RW) Profile : 0x001B (DVD+R) Profile : 0x002B (DVD+R/DL) Profile : 0x0010 (DVD-ROM) Profile : 0x0009 (CD-R) Profile : 0x000A (CD-RW) Profile : 0x0008 (CD-ROM) Profile : 0x0002 (Removable disk) Yours might omit some of those lines. A profile is a set of features. It describes a media role. Most of them are about writing particular media types. Some are about reading. > Not clear which medium is suitable for weekly backups. DVD-R and DVD+RW should both be ok. DVD-R can store up to 99 sessions with several MB wasted between each session. DVD+RW get their sessions emulated by xorriso with no more than 64 MB waste between sessions. In case that the drive announces to support DVD+R: 153 sessions with 4 MB waste between sessions. If you cannot avoid DVD-RW then format them (if profile 0x0013 is announced): xorriso -outdev /dev/sr0 -format as_needed This makes them similar to DVD+RW. DVD+RW and DVD-RW can be re-used. But xorriso will not be willing to overwrite them from scratch unless you explicitely tell it to invalidate the existing ISO 9660 filesystem (or other filesystem formats): xorriso -outdev /dev/sr0 -blank as_needed Have a nice day :) Thomas
