[Bug 500069] Re: since Ubuntu karmic Filetransfer to some USB Drives got realy slow

[Adam Kulagowski]

I've made a typo in my previous comment: you have to specify (at least
in my case) bs=64k , not bs=64. Command line example was correct. Any
other value, bigger or smaller (32k, 128k, 256k) brings speed down back
to 3MB/s.

One more thing. I've found second pen drive which is working correctly
(full 5MB/s writing speed). There are some small differences in lsusb
between those two. I'm attaching lsusb -v output.

On the working pen drive (Adata) bs doesn't really matter. Of course
with bigger block size, you get bigger writing speed up to 128k. Bigger
bs than 128k doesnt change anything. I've tested from 256k up to 2048k,
still achieving full writing speed.

I'll try to test more USB sticks.

** Attachment added: "lsusb for 2 USB pendrives"
   http://launchpadlibrarian.net/53126344/lsusb-v.txt

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since Ubuntu karmic Filetransfer to some USB Drives got realy slow
https://bugs.launchpad.net/bugs/500069
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