RE: How can I disable the READ-AHEAD feature using a --device driver

NTFSD
1

Do you mean your driver is the target file system driver ?
If so, actually are you who intialize the cache and read-ahead parameters.

Sorry but I think I don’t uderstand the problem …:-(.

Inaki.

-----Original Message-----
From: Alon Dashut
Sent: mi?rcoles 29 de marzo de 2000 18:41
To: File Systems Developers
Subject: [ntfsd] RE: How can I disable the READ-AHEAD feature using a
device driver

I can’t! When the thread enters my driver -> it has already been directed
to
MY file system driver.
Meaning, the device driver that I wrote gets requests directed to it only.
What other options do I have?

Many thanks, Alon.

-----Original Message-----
From: xxxxx@pandasoftware.es [mailto:xxxxx@pandasoftware.es]
Sent: Wednesday, March 29, 2000 4:30 PM
To: File Systems Developers
Subject: [ntfsd] RE: How can I disable the READ-AHEAD feature using a devi
ce driver

Add flag IRP_NOCACHE to Irp->Flags before passing it to target file system
driver.
This will disable cache and read-ahead.

Inaki.

> -----Original Message-----
> From: xxxxx@AppStream.co.il
> Sent: mi?rcoles 29 de marzo de 2000 10:11
> To: File Systems Developers
> Subject: [ntfsd] How can I disable the READ-AHEAD feature using a
> device driver
>
> I need to disable the Read-Ahead feature of Windows NT. I understand
that
> this can be done using the appropriate flags in the CreateFile API.
> My problem is, that I’m writing a device driver and I’m not responsible
> for
> using the CreateFile API, but rather I (the device driver) get file
system
>
> calls from the User that might trigger the Read-Ahead feature (as a
result
>
> of sequential reads).
> My question is: How do I disable the Read-Ahead feature for every thread

> that uses my device driver (meaning that I can’t use the CreateFile
> flags)?
>
> Many thanks, Alon.
>
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