I've been playing stressing packet writing. First noticed that large files, eg linux source, never copied over ok. So I tried this: # cdrwtool -d /dev/scd1 -q # pktsetup /dev/pktcdvd0 /dev/scd1 # mount /dev/pktcdvd0 /mnt/cdram # tar jxf linux-2.4.18.tar.bz2 # find linux -type f -exec "md5sum" "{}" ";" >> /tmp/md5sums # tar jxf linux-2.4.18.tar.bz2 -C /mnt/cdram # (cd /mnt/cdram ; md5sum -c /tmp/md5sums) >> /tmp/results # cat /tmp/md5sums | wc -l 10006 # cat results | grep FAILED | wc -l 650 That's a 6.5% error rate. Any idea what's up??? I'm using packet-2.4.19-pre2 on linux-2.4.18, HP M820 portable CDRW and a PCMCIA scsi, Adaptec clone from Iomega. I'd been wanting to do large files for backups, and with LVM "snapshots" this could be fun! Thanks. Bill