Hi, I've noticed that the burning process sometimes results in a slightly shorter ISO image though the content of all burned files is the same as the content of the original files and no files are missing. Does anybody know why it happens? Can those CDs be considered OK? More information: I burned 24 data CDs (cdrecord-1.9-54, SuSE 7.2, 2.4.4-64GB-SMP, IDE HP CD-Writer+ 9100, Kodak CD-R Ultima). Then I read these ISO images back via dd if=/dev/cdrecorder of=xx_cd.iso and compared them with the original images cmp xx.iso xx_cd.iso ISO images of 13 CDs matched the original (54%), 10 CDs had the ISO image shorter by exactly 2KB (otherwise OK), 1 ISO image was 4KB shorter (otherwise OK). Then, for every CD, I compared (via cmp) each original file with the corresponding file on the CD . No difference was found. There are no problems with reading those CDs so I keep them. But I'm a bit worried since they are used for archival purposes and some SW or HW problems may appear several years later. I've seen the same problem on Solaris 2.5.1 using cdrecord and a Plextor SCSI writer. I've also tried CDs from other manufactures - there is some difference in the "success rate" but not extremely big. -- Alexandr.Malusek@imv.liu.se