On 28/10/05, Randall R Schulz
Dave,
On Friday 28 October 2005 03:45, Dave Howorth wrote:
On Fri, 2005-10-28 at 11:37 +0100, Kevanf1 wrote:
...
Perhaps I'm missing something here but what's wrong with simply unplugging the camera?
Because the manufacturer's instructions say to turn off the camera before plugging/unplugging and I don't want to void my warranty.
Sorry, but USB is _by definition_ hot pluggable. This is probably a nonsense requirement promulgated by an ignorant party or a CYA attitude within the manufacturer's organization. It may also have to do with a misunderstanding of the limits of using removable USB storage media under Windows.
Don't stay backed into a corner. Use the SuSE default synchronous writing for USB mass (or flash) storage devices and just disconnect when the commands that write to the device complete. If you're reading it only, disconnect whenever you like.
Similarly, there's no reason you can't turn it off first if that makes you feel better. Again, use synchronous writing. When the device goes away, Linux will clean up its internal structures.
...
Cheers, Dave
Randall Schulz
Well, again, I may be missing something here, but.. surely the only reason not to simply unplug a USB device when you want to is if any data was being cached instead of written direct to the disk (or storage device). Does this happen in this case? I know that you couldn't simply unplug old style serial or parallel port drives etc because of the risk of burning the port out, this shouldn't happen with USB. Should it? -- ============================================== I am only human, please forgive me if I make a mistake it is not deliberate. ============================================== Take care. Kevan Farmer 34 Hill Street Cheslyn Hay Staffordshire WS6 7HR