I'm connecting my Linux server to an LTO-4 tape drive over a 1 gigabit LAN with very little other activity.
Doing some hand waving, I guess that I should allow ten bits per byte and a protocol overhead of around 40%. That gets me to about 60MB/s which I know is about half what the drive is capable of. However what I'm seeing is a consistent throughput of about 30MB/s which is quite a lot slower that I'd expect. The processor is an Intel Atom D525 1.80Ghz four core processor with 4GB RAM. The drive I'm backing up is a SATA SSD. The backup is run thus: sudo mt-st -f /dev/st0l setblk 65536 sudo dd bs=64k if=/dev/sdb | mbuffer -s 65536 -m -m 50% -P 80 -o /dev/st0l Is what I'm seeing pretty much the norm, or is there something I can do to get better throughput? Thanks in advance for any assistance you can provide. Dave -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. Visit this group at https://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.