I would like to create an iso image of a data cd. I started by following the directions from the FreeBSD Handbook (section 12.5) and ran the command:
dd if=/dev/acd1c of=freebsd_disk1_backup.iso bs=2048
(acd1 is my CD-ROM drive) After about 210MB had copied, I got the following error:
acd1: READ_BIG - MEDIUM ERROR asc=0x11 ascq=1x00 error=0x00 dd: /dev/acd1c: Input/output error
I tried the same command using the CD burner I have on acd0:
dd if=/dev/acd0c of=freebsd_disk1_backup.iso bs=2048
A similar error occurred:
acd0: READ_BIG - ILLEGAL REQUEST asc=0x64 ascq-0x00 error=0x04 dd: /dev/acd0c: Input/output error
I tried this on several disks (all known-good) and got the same result (at different points on the disk). I'm not sure what I am doing wrong.
Relevant configuration info (I hope):
acd0: CD-RW <Hewlett-Packard CD Writer Plus 9300> at ata1-master PIO4
acd1: CDROM <Lite-On LTN486 48x Max> at ata1-slave PIO4
uname -a output:
FreeBSD ping.mqtweb.com 4.7-RELEASE FreeBSD 4.7-RELEASE #0: Wed Oct 9 15:08:34 GMT 2002 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC i386
Any chance someone can shed some light on this for me?
Thanks, Paul D. Lathrop
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