Regarding Disk performance.

NTDEV
1

Hi,

I need to do some performance analysis on disks , basically I need info on
the number of reads writes and stuff like that. I used the
IOCTL_DISK_PERFORMANCE to get this from the disk. This did not seem to work,
eventhough the status returned by the deviceio call was sucessful the output
buffer was not populated with any of the required data(the output buffer was
untouched). can anyone tell me why this might be happening or is there any
other IOCTL that I may have to use.

Thanks and Regds,
Raj.

2

Just a suggestion.
the IOCTL_DISK_PERFORMANCE is handled by the diskperf driver.
the ddk contains the code for diskperf driver (see storage filters)

I would suggest to debug the driver, if nothing else works out.

regards
jeseem
mailto:xxxxx@hotmail.com

----- Original Message -----
From: “Kannan, Raj”
To: “NT Developers Interest List”
Sent: Thursday, August 24, 2000 4:14 PM
Subject: [ntdev] Regarding Disk performance.

> Hi,
>
> I need to do some performance analysis on disks , basically I need info on
> the number of reads writes and stuff like that. I used the
> IOCTL_DISK_PERFORMANCE to get this from the disk. This did not seem to
work,
> eventhough the status returned by the deviceio call was sucessful the
output
> buffer was not populated with any of the required data(the output buffer
was
> untouched). can anyone tell me why this might be happening or is there any
> other IOCTL that I may have to use.
>
> Thanks and Regds,
> Raj.
>
> —
> You are currently subscribed to ntdev as: xxxxx@hotmail.com
> To unsubscribe send a blank email to $subst(‘Email.Unsub’)
>
>

3

make sure disk performance monitoring is turned on. By default it is turned
off. To enable it, bring up a DOS/Command line window and type the
following command:
diskperf -y

After this, you will need to reboot for the change to take effect.

Greg

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of Kannan, Raj
Sent: Thursday, August 24, 2000 3:14 PM
To: NT Developers Interest List
Subject: [ntdev] Regarding Disk performance.

Hi,

I need to do some performance analysis on disks , basically I need info on
the number of reads writes and stuff like that. I used the
IOCTL_DISK_PERFORMANCE to get this from the disk. This did not
seem to work,
eventhough the status returned by the deviceio call was sucessful
the output
buffer was not populated with any of the required data(the output
buffer was
untouched). can anyone tell me why this might be happening or is there any
other IOCTL that I may have to use.

Thanks and Regds,
Raj.

You are currently subscribed to ntdev as: xxxxx@pdq.net
To unsubscribe send a blank email to $subst(‘Email.Unsub’)