I have a couple of large files I want to burn to an M-Disc 50G BD-R DL. Files are larger than 4G so I have to use UDFv3, if I am not mistaken. (Or split, which I am not especially keen on doing.)
A graphical tool is not an option (no X on the server and those do a remarkably bad job on that anyway in my experience) so what I plan on doing is the following:
- find the capacity of my medium with
dvd+rw-mediainfo. - create a temporary file with
dd if=/dev/zero of=/tmp/bd.udf bs=2048 count=nwith n being an integer extracted frommediainfo's output. - create a UDF filesystem on that temp with
mkudffs -b 2048 -l somelabel /tmp/bd.udf - mount it with
mount -o loop -t udf /tmp/bd.udf ./mntpt - populate it with my files
cp xyz* mntpt/ - unmount it
umount ./mntpt - burn it with
growisofs -Z /dev/dvd=/tmp/bd.udf -speed=5
Please correct me if this is not a good procedure. I'd be grateful for improvements.
What really confuses me is the output of dvd+rw-mediainfo:
INQUIRY: [PIONEER ][BD-RW BDR-UD03][1.11]
GET [CURRENT] CONFIGURATION:
Mounted Media: 41h, BD-R SRM
Media ID: VERBAT/IMf
Current Write Speed: 6.0x4495=26970KB/s
Write Speed #0: 6.0x4495=26970KB/s
Write Speed #1: 4.0x4495=17980KB/s
Write Speed #2: 2.0x4495=8990KB/s
Speed Descriptor#0: 00/24438783 [email protected]=26970KB/s [email protected]=26970KB/s
Speed Descriptor#1: 00/24438783 [email protected]=17980KB/s [email protected]=17980KB/s
Speed Descriptor#2: 00/24438783 [email protected]=8990KB/s [email protected]=8990KB/s
:-[ READ BD SPARE INFORMATION failed with SK=5h/MEDIUM NOT FORMATTED]: Wrong medium type
READ DISC INFORMATION:
Disc status: blank
Number of Sessions: 1
State of Last Session: empty
"Next" Track: 1
Number of Tracks: 1
READ FORMAT CAPACITIES:
unformatted: 24438784*2048=50050629632
00h(6000): 23652352*2048=48440016896
32h(0): 23652352*2048=48440016896
32h(0): 11200512*2048=22938648576
32h(0): 24307712*2048=49782194176
READ TRACK INFORMATION[#1]:
Track State: invisible incremental
Track Start Address: 0*2KB
Next Writable Address: 0*2KB
Free Blocks: 24438784*2KB
Track Size: 24438784*2KB
READ CAPACITY: 0*2048=0
Should I use the "unformatted" block count for the temp file? What does "32h(0)" etc. mean? Is it necessary to somehow account for error correction spare blocks or something...? In a first test I used unformatted block count - 1 (don't ask me why;) ) and writing ends with an error message (that I unfortunately didn't record). The disc was readable though and md5 sums were fine.
Can someone point me to a definitve guide for writing BDs on the command line?
