How can I initiate multiple I/O request

NTFSD
1

Hi, all
In the book File System Internals of R.Nagar, I read following words:
The Fsd may be able to obtain data in a singel I/O operation or, for discontiguous
data ,you FSD might need to make multiple request.
Your Fsd may initate multiple I/O request concurrently to the disk driver to handle
the discontiguous data case.

But how can I achieve it, and can someone tell me how I can find sample codes that have
implemented it.
I am sorry for my pool English.
thanks

2

You can try to use IoBuildAsynchronousFsdRequest, IoMakeAssociatedIrp,
IoAllocateIrp or something similar. A great sample is fastfat, part of
Microsoft’s IFS kit.

Joze

-----Original Message-----
From: Robin zhua [mailto:xxxxx@njinasoft.com]
Sent: Wednesday, April 23, 2003 7:39 AM
To: File Systems Developers
Subject: [ntfsd] How can I initiate multiple I/O request

Hi, all
In the book File System Internals of R.Nagar, I read following words:
The Fsd may be able to obtain data in a singel I/O operation or, for
discontiguous
data ,you FSD might need to make multiple request.
Your Fsd may initate multiple I/O request concurrently to the disk driver to
handle
the discontiguous data case.

But how can I achieve it, and can someone tell me how I can find sample
codes that have
implemented it.
I am sorry for my pool English.
thanks
b嫐.Ф\??辷?蝶j辱顽趍葴呹鎧?N嫥叉靣笡z千u﹀jy櫒ザ塣j鳔蝶譓{焐b槽(卜(

3

Thanks for your reply.
I just read the fastfat sample codes, but there are some many codes to read.
I can’t find out which function has implement this.
Maybe I will find out this function in the future.

Thanks.
----- Original Message -----
From: “Joze Fabcic”
To: “File Systems Developers”
Sent: Thursday, April 24, 2003 2:55 PM
Subject: [ntfsd] RE: How can I initiate multiple I/O request

You can try to use IoBuildAsynchronousFsdRequest, IoMakeAssociatedIrp,
IoAllocateIrp or something similar. A great sample is fastfat, part of
Microsoft’s IFS kit.

Joze

-----Original Message-----
From: Robin zhua [mailto:xxxxx@njinasoft.com]
Sent: Wednesday, April 23, 2003 7:39 AM
To: File Systems Developers
Subject: [ntfsd] How can I initiate multiple I/O request

Hi, all
In the book File System Internals of R.Nagar, I read following words:
The Fsd may be able to obtain data in a singel I/O operation or, for
discontiguous
data ,you FSD might need to make multiple request.
Your Fsd may initate multiple I/O request concurrently to the disk driver to
handle
the discontiguous data case.

But how can I achieve it, and can someone tell me how I can find sample
codes that have
implemented it.
I am sorry for my pool English.
thanks
b嫐.Ф\??辷?蝶j辱顽趍葴呹鎧?N嫥叉靣笡z千u﹀jy櫒ザ塣j鳔蝶譓{焐b槽(卜(

—
You are currently subscribed to ntfsd as: xxxxx@njinasoft.com
To unsubscribe send a blank email to xxxxx@lists.osr.com