> cdfs(4) contains a paragraph in BUGS that reads:
> Closing a just-written DVD-R track can take minutes while
> the drive burns the unused part of the track reservation
> (for the whole disc). Thus only a single DVD-R track can be
> written on a DVD-R disc; use other media if you need more
> than one track per disc.
> i know the array of media is confusing, but should i read this to imply that
> DVD+R media are expected to support multi-track writes?
yes.
> i just did something more or less like:
> for (i in 0 1 2 3 4 5 6 7)
> {venti/rdarena /dev/fs/arenas arenas0.$i > /mnt/cd/wd/$i}
> the results were not what i had expected: i got d000, which looked
> correct, and d001 which, upon cursory examination, looked like the
> concatenation of arenas 1-7. am i just SOL with multi-track DVDs?
with a dvd+r, this appears to work for me
; cp /sys/src/9/pc/sdiahci.c /mnt/cd/wd
; cp /sys/src/9/pc/sdorion.c /mnt/cd/wd
; lc /mnt/cd
ctl d000 d001 wd
except a disk in this condition confuses cdfs
; echo eject >/mnt/cd/ctl
; echo ingest>/mnt/cd/ctl
; lc /mnt/cd/
ctl wa wd
that's definately wrong. but after restarting cdfs
i get
; lc /mnt/cd
ctl d000 d001 wd
and adding tracks works, too.
; cp /sys/src/9/pc/sdata.c /mnt/cd/wd
; lc /mnt/cd
ctl d000 d001 d002 wd
scuzz shows what's happening. note that there's no way to
close the session so all the tracks appear in the first session.
rdiscinfo
data length: 0x20
info[2] 0x05
Incomplete disc (Appendable)
Incomplete Session
Number of First Track on Disc 1
Number of Sessions 1
First Track Number in Last Session 1
Last Track Number in Last Session 4
info[7] 0x00
info[8] 0x00
CD-DA or CD-ROM Disc
Last Session lead-in Start Time M/S/F: 0xFF/0xFC/0x00
Last Possible Start Time for Start of lead-out M/S/F:
0x23/0x05/0x40
- erik
