Johannes Niess wrote:
The classical mkisofs route works as expected. Feeding the packet driver with 4k blocks (mbuffer -s 4096) results in the full advertised 8x DVD writing speed:
tar -cvM -L4500000 -f - /mnt/data/backup/debian-2005-02-06.tar.gz /mnt/data/backup/snapshots/daily.0/ | mbuffer -m 1000k -s4096 -P 10 > /dev/pktcdvd/dvdrw
Without the -s 4096 option I get the same low performance behavior. I also tried different buffer sizes in the kernel module and the experimental write caching.
I have no idea what mbuffer is or what it is doing, but if you just dd a file to the pktcdvd device, you can use any block size you want and it works fine because the pktcdvd driver merges the small writes into full packets. -- To unsubscribe, e-mail: packet-writing+unsubscribe@opensuse.org For additional commands, e-mail: packet-writing+help@opensuse.org