Mount failure following USB flash key removal

Mount failure following USB flash key removal

[Andrew Marshall]

Hi All,

I would be very grateful for any advice any of you guys may have on the
following: -

I am running Kernel version 2.4.22 (uClinux distribution -- i'm currently
unable to upgrade for various reasons...).

I've found that when removing a USB flash key device during a file read,
once the device is re-inserted, all subsequent attempts to mount said device
seem fail with a busy error.

The device is properly unmounted and file handles etc. closed at removal by
code invoked by hotplug.

Is this something that may have been fixed in a later version of the
kernel -- or is there anyway I can manually reset the device?

Any assistance here is greatly appreciated.

Many thanks!


Kind Regards,


Andrew Marshall




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Re: Mount failure following USB flash key removal

[Patrick Mansfield]

On Thu, Apr 07, 2005 at 01:48:27AM +0100, Andrew Marshall wrote:
> Hi All,
> 
> I would be very grateful for any advice any of you guys may have on the
> following: -
> 
> I am running Kernel version 2.4.22 (uClinux distribution -- i'm currently
> unable to upgrade for various reasons...).
> 
> I've found that when removing a USB flash key device during a file read,
> once the device is re-inserted, all subsequent attempts to mount said device
> seem fail with a busy error.
> 
> The device is properly unmounted and file handles etc. closed at removal by
> code invoked by hotplug.

You mean you unmount after the hotplug for device removal?

You have to unmount before the removal. Depending on the file system in
use, you'll get different behaviour, some 2.4.x file systems will panic.

I don't know what happens if the device is mounted or used read only.

> Is this something that may have been fixed in a later version of the
> kernel -- or is there anyway I can manually reset the device?

I doubt there is any fix or reset to get around the problems with 2.4.x,
AFAIR in 2.6.x some file system behave better (re-mount device as read
only, instead of a panic).

-- Patrick Mansfield


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