GUID_IO_VOLUME_DISMOUNT

NTDEV
1

Hi,

After getting “GUID_IO_VOLUME_DISMOUNT” PnP event
(EventCategoryTargetDeviceChange), as part of processing this event in the
PnP notification callback routine, is it fine to do IO on a file (residing
on File System) on that volume meaning can we assume that Volume/FS is not
yet unmounted and we can do last few IOs.

Thanks,
Sunil

2

No you cannot, you will get STATUS_TOO_LATE or STATUS_FILE_CLOSED or such.

–
Maxim S. Shatskih
Windows DDK MVP
xxxxx@storagecraft.com
http://www.storagecraft.com

“Sunil Patil” wrote in message news:xxxxx@ntdev…
Hi,

After getting “GUID_IO_VOLUME_DISMOUNT” PnP event (EventCategoryTargetDeviceChange), as part of processing this event in the PnP notification callback routine, is it fine to do IO on a file (residing on File System) on that volume meaning can we assume that Volume/FS is not yet unmounted and we can do last few IOs.

Thanks,
Sunil

3

What if we attempt to do IO on volume object itself in below scenario, will
that fail too?

On Thu, Jan 13, 2011 at 5:04 PM, Maxim S. Shatskih
wrote:

> No you cannot, you will get STATUS_TOO_LATE or STATUS_FILE_CLOSED or
> such.
>
> –
> Maxim S. Shatskih
> Windows DDK MVP
> xxxxx@storagecraft.com
> http://www.storagecraft.com
>
> “Sunil Patil” wrote in message news:xxxxx@ntdev…
> Hi,
>
> After getting “GUID_IO_VOLUME_DISMOUNT” PnP event
> (EventCategoryTargetDeviceChange), as part of processing this event in the
> PnP notification callback routine, is it fine to do IO on a file (residing
> on File System) on that volume meaning can we assume that Volume/FS is not
> yet unmounted and we can do last few IOs.
>
> Thanks,
> Sunil
>
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