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Re: dvd+rw-tools multisession recording fails after a few sessions

Thomas Schmitt wrote:

Hi,

i would say the media is worn off by too many
write sessions.



It [growisofs within script] works fine for a few
sessions and it then fails to write.
...
This  is the output of the mediainfo:
...
READ DISC INFORMATION:
 Disc status:           appendable
 Number of Sessions:    95
 State of Last Session: empty
 "Next" Track:          95
 Number of Tracks:      95


95 sessions is not "a few".
Rather "quite a bunch".

Is 95 a realistic count ? Did you do as many ?



Sep  3 00:14:49 kernel: SCSI cdrom error : host 1 channel 0 id 0 lun 0
return code = 8000002
Sep  3 00:14:49 kernel: Current sd0b:01: sns = 70  4
Sep  3 00:14:49 kernel: ASC=3e ASCQ= 2
Sep  3 00:14:49 kernel: Raw sense data:0x70 0x00 0x04 0x00 0x00 0x00 0x00
0x0a 0x00 0x00 0x00 0x00 0x3e 0x02 0x00 0x00 0x00 0x00 Sep 3 00:14:49 kernel: I/O error: dev 0b:01, sector 64 Sep 3 00:14:50 rlc[10]: writeTocd: error Interrupted system call 

4 3E 02 is SCSI error TIMEOUT ON LOGICAL UNIT



Sep  3 00:14:56 kernel: sr1: CDROM (ioctl) error, command: 0x54 01 00 00 00
00 00 00 00 00 Sep 3 00:14:56 kernel: Current sr00:00: sns = 70 3 
Sep  3 00:14:56 kernel: ASC=73 ASCQ= 2
Sep  3 00:14:56 kernel: Raw sense data:0x70 0x00 0x03 0x00 0x00 0x00 0x00
0x0a 0x00 0x00 0x00 0x00 0x73 0x02 0x00 0x00 0x00 0x00 

0x54 is MMC command SEND OPC INFORMATION.
This is a typical preparation command for writes.

3 73 02 is SCSI error POWER CALIBRATION AREA IS FULL
I think that describes the problem, each session needs to calibrate, and the media ran out of room to do more. That's my read on this, I've done 15 or so sessions, but 95 is rather a lot. Considering that Farshad identified the media as DVD-R and he only has 95 sessions on it, a full DVD would have been 700-800 sessions. I think that's outside the expected usage profile. ;-) 


growisofs 5.21 and mkisofs 2.0 are old, indeed.
But i would not blame an OPC error on them.
Hopefully not, at least anyone who was able to decode the status return. Too many sessions to calibrate is not likely to be helped by going to newer software. 


This seems rather ito be a question of drive and media
compatibility resp. quality.
This sounds like a good place for a USB flash adapter and flash card, nicely non-volatile, easily supports a dataset per subdirectory, and able to handle the data volume. When full to ~1GB, then copy to DVD sessions if needed. This really sounds like just use of inappropriate technology. 

--
bill davidsen <davidsen@tmr.com>
 CTO TMR Associates, Inc
 Doing interesting things with small computers since 1979
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