RE: USB Devices not working

[Shawn Iverson <shawn nccsc k12 in us>]

> From: Fritz Whittington [mailto:f whittington att net]
> Sent: Sunday, February 01, 2004 10:46 AM
> 
> 
> >> Also, once you are have troubleshooted your issue, always manually 
> >> unmount
> >> your device before unplugging it, especially if you are 
> performing write
> >> operations to it.
> >>
> How very important!   If you don't believe that delayed-write is 
> working, try mounting a USB fs (one that uses a solid-state 
> memory, like 
> Compact Flash or Smart Media),  copying several MB of files 
> from it to a 
> hdd, and note how slow it is.   Then delete all the files on the USB 
> device, and copy all the files back.  The copy is done almost in an 
> instant!  But then, when you unmount it, you can see it take several 
> seconds to actually write the files from cache.  So if you 
> yanked it out 
> without unmounting it, you wouldn't really have anything.
> 

It would be nice if usb devices such as this could be forced to write their
data ASAP instead of waiting for a umount (despite a performance lag).  It
is so tempting for many people that I know to just go ahead and unplug.  I
am going to do some research on this.