On Wed, 2008-11-26 at 19:34 +0100, Ariel Rocholl wrote:
> Yes, my worst experiences are with Windows drivers. But this is relevant
> because many (including the original post) consider someting is main stream
> when Windows supports it.
> 
> One example is to get a 16GB CF card from Sandisk or Samsung, to put some
> known trademarks I've tried. Use now a Sandisk CF reader into your USB2,
> copy a full set of 8x2GB files into the CF card. More often than not,
> Windows will freeze. Easy way to fix is to limit the copy speed, using for
> instance TotalCommander, to something like 5MB/sec.
> 
> This is by no mean the only case, but one very easy to test. I've
> experienced a plethora of problems in many different machines at highest
> USB2 speed when you work with USB HD drives, devices connected to a USB host
> rather than directly to the mainboard USB, etc.
> 
> This is very different experience than I have with Firewire, same HD using
> the Firewire port never hangs at max speed, whereas on USB2 frequently get
> "unable to write page swap" and need rejoining the drive.
> 
> And now we increase the speed on USB3.
> 
> Certainly not for me.

Doesn't sound like you're doing anything out of the ordinary. I'm
curious, WHICH version of windows? I know Vista had several file system
issues early on, and your description does have some similarities.

FWIW I regularly move multi GB files to and from USB mass storage
devices and have never encountered the problems you describe. I
routinely get 30MB/s from my "media drive", which is a 500GB USB drive
connected to my server downstairs. The 30MB/s I get could very well be
the physical limit of the drive, or it could be USB, I've never cared to
find out. Flash cards never reach that speed, most will top out at about
10-15MB/s, which has nothing to do with USB, it's just their physical
limit.

Personally USB3 will be welcome; but I think people miss the point when
they only consider current USB2 usage. The bandwidth USB3 will supply
with allow for applications that either barely work now (the USB2 video
cards that are now available), or simply don't exist right now (i.e. how
about adding an extra CPU to your system for video transcoding,
connected to your PC through USB3?)

TTYL

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist