track:   1 lba:         0 (        0) 00:02:00 adr: 1 control: 4 mode: 2
track:   2 lba:     11702 (    46808) 02:38:02 adr: 1 control: 4 mode: 2
track:   3 lba:     20054 (    80216) 04:29:29 adr: 1 control: 4 mode: 2
track:lout lba:     20356 (    81424) 04:33:31 adr: 1 control: 4 mode: -1

Track 01: data    0 MB         padsize: 504 KB
Total size:       0 MB (00:04.02) = 302 sectors
Lout start:       1 MB (00:06/02) = 302 sectors

$ cdrecord -msinfo dev=/dev/sg0
MULTI_INFO=0,11702

Track 02: Total bytes read/written: 2969600/2969600 (1450 sectors).

— 11702 + 1450 = 13152

$ cdrecord -msinfo dev=/dev/sg0
MULTI_INFO=11702,20054

Starting new track at sector: 20054
Track 03:   0 of   0 MB written.
Track 03: writing 228 KB of pad data.
Track 03: Total bytes read/written: 380928/614400 (300 sectors).

— 20054 + 300 +2 = 20356

Getting disc info

$ cdrecord -msinfo dev=/dev/sg0
MULTI_INFO=0,11702

+ mkisofs -R -T -f -o /tmp/backup.img /tmp/backupshadow
Total translation table size: 46
Total rockridge attributes bytes: 326
Total directory bytes: 0
Path table size(bytes): 10
Max brk space used 4544
48 extents written (0 Mb)

+ cdrecord dev=/dev/sg0 -multi -eject -v speed=4 /tmp/backup.img
Cdrecord 1.10 (i686-pc-linux-gnu) Copyright (C) 1995-2001 Jorg Schilling
TOC Type: 3 = CD-ROM XA mode 2
cdrecord: Operation not permitted. WARNING: Cannot do mlockall(2).
cdrecord: WARNING: This causes a high risk for buffer underruns.
cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler
cdrecord: Permission denied. WARNING: Cannot set priority using setpriority().
cdrecord: WARNING: This causes a high risk for buffer underruns.
scsidev: '/dev/sg0'
devname: '/dev/sg0'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.1.24
Using libscg version 'schily-0.5'
atapi: 1
Device type    : Removable CD-ROM
Version        : 0
Response Format: 2
Capabilities   :
Vendor_info    : 'SONY    '
Identifikation : 'CD-RW  CRX175A1 '
Revision       : '5YS2'
Device seems to be: Generic mmc CD-RW.
Using generic SCSI-3/mmc CD-R driver (mmc_cdr).
Driver flags   : SWABAUDIO
Drive buf size : 1966272 = 1920 KB
FIFO size      : 4194304 = 4096 KB
Track 01: data    0 MB         padsize: 504 KB
Total size:       0 MB (00:04.02) = 302 sectors
Lout start:       1 MB (00:06/02) = 302 sectors
Current Secsize: 2048
ATIP info from disk:
  Indicated writing power: 5
  Reference speed: 2
  Is not unrestricted
  Is erasable
  ATIP start of lead in:  -11940 (97:22/60)
  ATIP start of lead out: 335975 (74:41/50)
  speed low: 0 speed high: 4
  power mult factor: 3 5
  recommended erase/write power: 2
  A2 values: 5A A6 14
Disk type:    Phase change
Manuf. index: 43
 Manufacturer: Acer Media Technology, Inc.
Blocks total: 335975 Blocks current: 335975 Blocks remaining: 335673
cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler
cdrecord: Permission denied. WARNING: Cannot set priority using setpriority().
cdrecord: WARNING: This causes a high risk for buffer underruns.
Starting to write CD/DVD at speed 4 in write mode for multi session.
Last chance to quit, starting real write in 0 seconds. Operation starts.
Waiting for reader process to fill input buffer ... input buffer ready.
Performing OPC...
Starting new track at sector: 0
Track 01:   0 of   0 MB written.
Track 01: writing 504 KB of pad data.
Track 01: Total bytes read/written: 98304/614400 (300 sectors).
Writing  time:   13.534s
Fixating...
Fixating time:   79.694s
cdrecord: fifo had 2 puts and 2 gets.
cdrecord: fifo was 0 times empty and 0 times full, min fill was 100%.

Only two files written to the cd, TRANS.TBL & DATE.

Getting disc info

$ cdrecord -msinfo dev=/dev/sg0
MULTI_INFO=0,11702

+ mkisofs -R -T -f -o /tmp/backup.img -C 0,11702 -M /dev/scd0 /tmp/backupshadow
Rock Ridge signatures found
Total translation table size: 598
Total rockridge attributes bytes: 1208
Total directory bytes: 0
Path table size(bytes): 10
Max brk space used 4000
13152 extents written (25 Mb)

Performing OPC...
Starting new track at sector: 11702
Track 02:   2 of   2 MB written (fifo 100%).
Track 02: Total bytes read/written: 2969600/2969600 (1450 sectors).
Writing  time:    9.640s
Fixating...
Fixating time:   40.618s
cdrecord: fifo had 47 puts and 47 gets.
cdrecord: fifo was 0 times empty and 0 times full, min fill was 100%.

the whole /export/baks directory get written it. But the file case and name is odd, because of the format it chose.

11702 (new track starting sector) - 302 (last session total sectors) = 11400

Getting disc info

$ cdrecord -msinfo dev=/dev/sg0
MULTI_INFO=11702,20054

+ mkisofs -r -N -L -d -D -J -f -o /tmp/backup.img -C 11702,20054 -M /dev/scd0 /tmp/backupshadow
Warning: creating filesystem that does not conform to ISO-9660.
Rock Ridge signatures found
Using KS8000.CFG for  /tmp/backupshadow/ks/ks8.cfg,v (ks8.cfg)
Total translation table size: 0
Total rockridge attributes bytes: 4478
Total directory bytes: 6144
Path table size(bytes): 20
Max brk space used a000
20240 extents written (39 Mb)

Performing OPC...
Starting new track at sector: 20054
Track 03:   0 of   0 MB written.
Track 03: writing 228 KB of pad data.
Track 03: Total bytes read/written: 380928/614400 (300 sectors).
Writing  time:    5.706s
Fixating...
Fixating time:   40.638s
cdrecord: fifo had 6 puts and 6 gets.
cdrecord: fifo was 0 times empty and 0 times full, min fill was 100%.

The ks directory under /export/baks is appended. The file names show correctly this time, including long file names.