>From: [EMAIL PROTECTED] (Tom Crane)
>Dear All,
> I have the following problem with readcd: Using the command,
>$ readcd -vv dev=0,0,0 -f /tmp/test2.raw
>scsidev: '0,0,0'
>scsibus: 0 target: 0 lun: 0
>Linux sg driver version: 3.1.24
>readcd: Warning: controller returns wrong size for CD capabilities page.
>readcd: Warning: controller returns wrong size for CD capabilities page.
>Capacity: 181489 Blocks = 416857 kBytes = 407 MBytes = 426 prMB
>Sectorsize: 2352 Bytes
>Copy from SCSI (0,0,0) disk to file '/tmp/test2.raw'
>end: 181489
>addr: 181489 cnt: 411
>Time total: 593.027sec
>Read 416857.55 kB at 702.9 kB/sec.
>generates the file,
>-rw-r--r-- 1 root users 426862128 Oct 30 20:10 test2.raw
>However, the image is corrupt. The source CD (actually a CDR) is OK and
>repeated applications of readcd give the same written image. However, using dd
>to dump the source CD completes without error and gives,
>-rw-r--r-- 1 root root 371689472 Oct 30 19:51 test.raw
>This image is good, mounting it together with the source CD and doing 'diff -r'
>on the two FSs gives no difference.
>The CDROM drive is an AOPEN 56 speed device, as follows,
>Abstract File id:
>Bibliographic File id:
>Volume set size is: 1
>Volume set seqence number is: 1
> ^^^^^^^---------------- Note to Jorg: You have a trivial typo here
Thank you.
>Ps. System is Linux-2.4.19.
>Ps2. Since doing the above tests. I have tried a couple more tests:-
>(1) Reading another CD (a 'proper' factory pressed one this time). Again readcd
>gives a significantly larger file containing a corrupt image.
>(2) Using the machine's other drive (a Plextor CDwriter) gives identical and
>non corrupt images via both dd and readcd. Is the answer probably bad AOpen
>firmware? :-(. If so, is there a workaround? I'd rather not have to change the
>frontend my users use (KOnCD), to use dd. In any case this is nasty, if it
>were to be tried on a multi session CD...
So you found the reason: corrupt firmware in the drive. Try ti get fixed fw from
the manufacturer.
Jörg
EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin
[EMAIL PROTECTED] (uni) If you don't have iso-8859-1
[EMAIL PROTECTED] (work) chars I am J"org Schilling
URL: http://www.fokus.gmd.de/usr/schilling ftp://ftp.fokus.gmd.de/pub/unix
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