Hi, I have an iso file (which contains an iso9660/udf filesystem) that I've written to a dvd-r using growisofs, thus:
# growisofs -dvd-compat -speed=1 -Z /dev/hdc=myDVD.iso In the past, I have been able to check (verify) the burn finding the iso size (using "isoinfo -d -i <isoFile>") and then by comparing the output from: # dd if=myDVD.iso bs=2048 count=<volSize> | md5sum with # dd if=/dev/hdc bs=2048 count=<volSize> | md5sum (and checking /var/log/syslog for any read errors) Now I have started getting read errors close to the lead-out, so I append 150 2k blocks to the end of the iso file using: # dd if=/dev/zero bs=2048 count=150 >> myDVD.iso and I even disable readahead using hdparm: # hdparm -a 0 /dev/hdc But I still get read errors around near the end of the dvd: # dd if=/dev/hdc bs=2048 count=2002922 | md5sum dd: reading `/dev/hdc': Input/output error 1938744+0 records in 1938744+0 records out Could someone please tell me: 1) Is this the dreaded readahead bug again? 2) Can I use dd to verify my burns and avoid the readahead bug? 3) If not, how can I verify my dvd burn? Thank you for your help. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
