On Thu, 6 Apr 2000, Miles Lane wrote:
> Speaking of USB devices that are not always in use, what are we going
> to do to make using mountable removable media easy? I am referring to
> the differences between how Linux treats removable media and how
> Windoze/Mac does. For example, when you write a file to the Castlewood
> ORB drive using usb-storage, that file may not have actually been fully
> written. I have seen a case when I had copied a directory tree to the
> ORB drive, moved the drive to a Windoze machine and discovered that
> half of the files where 4KB.
>
> I haven't really checked, but are we handling the case where a storage
> device is disconnected without the usual "sync"/"umount" cycle? Is
> there a way for us to do this? I notice that folks are working an the
> automount portion, but I haven't seen discussion of unmounting.
Because of the way linux can cache disk access, you're pretty much screwed
here. If it's a dos/vfat filesystem, I just use mtools to access it --
that avoids the problem.
The SCSI layer will keep the module usage count non-zero if it still needs
the device. That seems to be the best behavior I can find for usb-storage
-- it acts like any other SCSI driver.
Oh, and if you yank a drive while it's in use, the driver will report "not
ready" in the hopes that you'll reconnect the drive. If you do, it
_should_ be able to start back up.
Matt Dharm
--
Matthew Dharm Home: [EMAIL PROTECTED]
Engineer, Qualcomm, Inc. Work: [EMAIL PROTECTED]
What the hell are you?
-- Pitr to Dust Puppy
User Friendly, 12/3/1997
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