try specifying the number of blocks and
the block size. This will tell dd when to stop specifically.
You are probably running past the EOF.
J.
On Thu, 4 Nov 1999, johnsj20 wrote:
> Hello,
> I have been having a problem making iso images with dd on my cdroms. I get
> an i/o error at the end of the cd. The cd iso file sizes seem to be
> correct but the errors worry me a bit. I tried dd with multiple cds and on
> both cdrom drives. I have a techram dc-390u2w card and I have a u2 ibm
> drive, teac CD-R55S, teac CD-ROM CD-532S, and an external iomega zip
> 100. I am running linux Mandrake 6.1 on an Abit Bp6 with dual 400mhz Cpus.
>
> Card Connectors:
> u2w--| (ID0)u2 IBM ---> {external adapter} (ID6)External Zip --->
> Terminator|
>
> uw----| (ID2)CD-ROM CD-532S ----> (ID4)CD-R55S ----> terminator|
>
>
> CD-R55S
> ---------------------
> [root@500smp /root]# dd if=/dev/scd1 of=mandrake.iso
> SCSI CD error : host 0 id 4 lun 0 return code = 28000002
> Info fld=0x4c5c9, Current sr0b:01: sense key Blank Check
> CD-ROM I/O error: dev 0b:01, sector 1251108
> dd: /dev/scd1: Input/output error
> 1251108+0 records in
> 1251108+0 records out
> SCSI CD error : host 0 id 4 lun 0 return code = 28000002
> Info fld=0x4c5ca, Current sr0b:01: sense key Blank Check
> CD-ROM I/O error: dev 0b:01, sector 1251112
>
>
> CD-ROM CD-532S
> ---------------------
> [root@500smp /root]# dd if=/dev/scd0 of=scd0.iso
> scsi0: MEDIUM ERROR on channel 0, id 2, lun 0, CDB: Read (10) 00 00 04 66 d1 00
> 00 02 00
> Info fld=0x466d1, Current sr0b:00: sense key Medium Error
> Additional sense indicates Unrecovered read error
> CD-ROM I/O error: dev 0b:00, sector 1153860
> dd: /dev/scd0: Input/output error
> 1153860+0 records in
> 1153860+0 records out
> scsi0: MEDIUM ERROR on channel 0, id 2, lun 0, CDB: Read (10) 00 00 04 66 d2 00
> 00 01 00
> Info fld=0x466d2, Current sr0b:00: sense key Medium Error
> Additional sense indicates Unrecovered read error
> CD-ROM I/O error: dev 0b:00, sector 1153864
>
>
> Any suggestions would be helpfull!
>
>
> Jake Johnson
> Information Technology Desktop Support Intern
> Dempsey 207
>
>
>
>
> .^.
> /V\ Linux!
> // \\
> /( )\
> ^^-^^
>
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