On Monday, March 27, 2017 at 9:03:59 AM UTC-7, [email protected] wrote: > > 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 > > > Have you set the Write Immediate Filemark option for the st driver?
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