Hello, I am trying to correctly copy a cdrom using cdrecord and readcd. I'm
having an error using readcd on the copies I have made. This is what I did
to copy the cd:
readcd dev=0,0,0 f=cdrom.iso
cdrecord -v speed=8 dev=0,0,0 cdrom.iso
The resulting cdrom copy seems to work ok. I can mount it, etc. However, if
I try to use readcd on the copy of the cd, like I did on the master, it fails
with some errors:
[root@comptechserv]:/home/reaster/cdrom# readcd dev=0,0,0 f=cdrom.iso
Capacity: 318656 Blocks = 637312 kBytes = 622 MBytes = 652 prMB
Sectorsize: 2048 Bytes
Capacity: 318656 Blocks = 637312 kBytes = 622 MBytes = 652 prMB
Sectorsize: 2048 Bytes
Copy from SCSI (0,0,0) disk to file 'cdrom.iso'
end: 318656
readcd: Input/output error. read_g1: scsi sendcmd: retryable error
CDB: 28 00 00 04 DC 80 00 00 40 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: F0 00 03 00 04 DC BE 0A 00 00 00 00 06 00 00 00
Sense Key: 0x3 Medium Error, Segment 0
Sense Code: 0x06 Qual 0x00 (no reference position found) Fru 0x0
Sense flags: Blk 318654 (valid)
cmd finished after 0.057s timeout 40s
readcd: Input/output error. Cannot read source disk
readcd: Retrying from sector 318592.
...............................................................~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~
~~+~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~~+~~~-~~~
readcd: Input/output error. Error on sector 318654 not corrected. Total of 1
errors.
Time total: 245.652sec
I read that there are some lead-in and lead-out. I've also read about Disk
At Once (DAO). I think my problems are related to these things, but I'm not
sure exactly how to deal with them.
Can anyone suggest the commands I should be using to fix this problem?
The lead-out is 2 sectors? DAO is suggested in some docs I read. I was
thinking of doing this:
readcd sectors=0-318654 dev=0,0,0 f=master.iso
cdrecord -v speed=8 dev=0,0,0 -dao master.iso
Will this fix my problem or just waste another cd? :)
Also, there was some mention somewhere that copies of cdroms made with readcd
or dd should have the .raw filename. Does it matter that I use .iso or .raw?
I only have the cdwriter drive, just one drive. Does the -isosize option to
cdrecord have any usefulness here? I've only seen examples of its use when
coping directly from one drive to another. I have to write an image file
first since I don't have two drives.
--
-------- Robert B. Easter [EMAIL PROTECTED] ---------
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