Alan Stern wrote:
This isn't diretly connected with the speed; it's more a question of how much data can be sent in a single command. Setting max_sectors to 120 limits the driver to sending 60 KB at once (a sector is 512 bytes).
It's the only real throughput-restricting control we have to work with ... so I'm glad it seems to help here!
That's not a problem -- all the data will be sent -- it just has to be
broken up into more commands. So there's extra overhead and extra work
because of the extra commands, which will slow things down a bit. Probably not too much though. Anyway, it's better than not working at
all!
Yes, that's right. And the Linux kernel is much faster (about 40%) in copying data to usb storage (at my pc) than win. 650MB -> usb storage win: 75 sec. lin: 45 sec!
Yeouch! Microsoft's EHCI drivers? From what OS version? Identical hardware in both cases?
That kind of speed difference is interesting. Scarey though, given how many vendor only test against Windows and who may accordingly be shipping more such bugs in their products.
- Dave
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