I am trying to use my laptop (running Debian Jessie) and an external USB DVD reader/writer to burn an ISO to a DVD-RW.
However, upon inserting my disk, it appears to have been detected as read-only:
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 700.1M 0 rom
The following appears in dmesg when I connect the reader:
[10549.386006] usb 1-1: new high-speed USB device number 10 using xhci_hcd
[10549.522596] usb 1-1: New USB device found, idVendor=152e, idProduct=2571
[10549.522618] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[10549.522634] usb 1-1: Product: External USB DVDRW Drive
[10549.522647] usb 1-1: Manufacturer: HLDS Inc
[10549.522660] usb 1-1: SerialNumber: DA00000000000000100
[10549.524138] usb-storage 1-1:1.0: USB Mass Storage device detected
[10549.525467] scsi5 : usb-storage 1-1:1.0
[10551.538610] scsi 5:0:0:0: CD-ROM HL-DT-ST DVDRAM GP30NB30 1.00 PQ: 0 ANSI: 0
[10551.625316] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[10551.626540] sr 5:0:0:0: Attached scsi CD-ROM sr0
[10551.627054] sr 5:0:0:0: Attached scsi generic sg1 type 5
How do I get this DVD to mount in such a way that I can actually write to it?
Best Answer
This question looks indeed like a duplicate of question 68426. But the answers there are partly wrong in respect to
dd
.The fact that Linux reports the drive as CD-ROM does not indicate that it cannot be used for writing. CD-ROM is just one of the drive's many jobs. Yours is obviously an LG DVD burner. Classified by Linux as "24x/24x writer".
Whether you can write to an optical medium by help of
dd
depends on the medium type:Formatted CD-RW, formatted DVD-RW, DVD-RAM, DVD+RW, BD-RE, and BD-R in modes POW or RRM are supposed to work with
dd
. These media behave in many ways like slow hard disks or giant floppies. Linux would be willing to mount them writable if you put a writable filesystem on it. E.g.ext2
orFAT
. (But Don't ! Performance is awful. Media wear-off is terrible. Use burn programs ordd
to write them.)Before
dd
works on newly purchased media, formatting has to be done once bydvd+rw-format
or one of the burn programs below. (dvd+rw-format
is the formatter companion ofgrowisofs
.)CD-R, unformatted DVD-RW or CD-RW, DVD-R, DVD-R DL, DVD+R, DVD+R DL, and BD-R in mode SRM can only be written by help of a burn program. Candidates in Debian Jessie are on command line
wodim
for CD,growisofs
for DVD/BD,cdrskin
,xorriso
for CD/DVD/BD. GUI programs arexfburn
,brasero
,k3b
and possibly some more.