partmrg.sys and diskperf.sys is attached over this driver USBSTOR.sys

NTDEV
1

Hi

I have plugged the pendrive into the USB port of the system.
Immediatly a POP appears showing new hardware found and the driver
usbstor.sys is installed after this popup…
By using the device tree downloaded from OSR, I have seen these two
drivers(partmgr and diskperf) attached over usbstor.sys.

So anyone could please tell why this is happening.

And why there is no driver installed over flpydisk.sys.

Thanks
Rohit

2

partmgr and diskperf are upper filters for the “Disk Drive” stack.
usbstor.sys is the PDO for the disk device stack and disk.sys is the FDO.

Shahar

“Rohit Gauba, Noida” wrote in message news:xxxxx@ntdev…
Hi

I have plugged the pendrive into the USB port of the system.
Immediatly a POP appears showing new hardware found and the driver
usbstor.sys is installed after this popup…
By using the device tree downloaded from OSR, I have seen these two
drivers(partmgr and diskperf) attached over usbstor.sys.

So anyone could please tell why this is happening.

And why there is no driver installed over flpydisk.sys.

Thanks
Rohit