filter driver getting physical sector size of device?

Hi,

Where would a filter driver for disk drives find the physical sector size of
the device? Checking the pdo SectorSize field has zero.

TIA!!

IOCTL_DISK_GET_DRIVE_GEOMETRY(_EX)

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com

"David F." <> wrote in message news:4BAA535D-38E0-4B06-A9B7-...
> Hi,
>
> Where would a filter driver for disk drives find the physical sector size of
> the device? Checking the pdo SectorSize field has zero.
>
> TIA!!
>

thanks - seems to work doing the ioctl in AddDevice - but - should the
driver wait until IRP_MN_START_DEVICE to send the ioctl?


"Maxim S. Shatskih" <> wrote in message
news:...
IOCTL_DISK_GET_DRIVE_GEOMETRY(_EX)

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com

"David F." <> wrote in message
news:4BAA535D-38E0-4B06-A9B7-...
> Hi,
>
> Where would a filter driver for disk drives find the physical sector size
> of
> the device? Checking the pdo SectorSize field has zero.
>
> TIA!!
>

> driver wait until IRP_MN_START_DEVICE to send the ioctl?

I think yes.

--
Maxim S. Shatskih
Windows DDK MVP

http://www.storagecraft.com