Question on file system

NTFSD
1

Hi,

How to programmatically determine the amount of hard disk space used?

Thanks,
Shakeel.

2

You mean in the user mode or in the kernel mode ?

UserMode - GetDiskFreeSpaceEx
KernelMode - IRP_MJ_QUERY_VOLUME_INFORMATION
with FileFsSizeInformation

L.

3

Thanks Ladislav for your help.

How to translate this information to a LBA level. OR Are there other APIs
at user mode or kernel mode that provide that information. for example: from
LBA 0 - LBA XXX is used and LBA XXX - LBA ZZZ is unused/free space.

I appreciate your help,
Shakeel.

“Ladislav Zezula” wrote in message news:xxxxx@ntfsd…
> You mean in the user mode or in the kernel mode ?
>
> UserMode - GetDiskFreeSpaceEx
> KernelMode - IRP_MJ_QUERY_VOLUME_INFORMATION
> with FileFsSizeInformation
>
> L.
>
>

4

There isn’t a specific range things quicky get scattered. You might look at
http://www.sysinternals.com/ntw2k/info/defrag.shtml for some info.

–
Don Burn (MVP, Windows DDK)
Windows 2k/XP/2k3 Filesystem and Driver Consulting

“shakeel” wrote in message news:xxxxx@ntfsd…
> Thanks Ladislav for your help.
>
> How to translate this information to a LBA level. OR Are there other APIs
> at user mode or kernel mode that provide that information. for example:
from
> LBA 0 - LBA XXX is used and LBA XXX - LBA ZZZ is unused/free space.
>
> I appreciate your help,
> Shakeel.
>
> “Ladislav Zezula” wrote in message news:xxxxx@ntfsd…
> > You mean in the user mode or in the kernel mode ?
> >
> > UserMode - GetDiskFreeSpaceEx
> > KernelMode - IRP_MJ_QUERY_VOLUME_INFORMATION
> > with FileFsSizeInformation
> >
> > L.
> >
> >
>
>
>

5

FSCTL_GET_VOLUME_BITMAP

Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

----- Original Message -----
From: “shakeel”
Newsgroups: ntfsd
To: “Windows File Systems Devs Interest List”
Sent: Thursday, September 16, 2004 9:58 PM
Subject: Re:[ntfsd] Question on file system

> Thanks Ladislav for your help.
>
> How to translate this information to a LBA level. OR Are there other APIs
> at user mode or kernel mode that provide that information. for example: from
> LBA 0 - LBA XXX is used and LBA XXX - LBA ZZZ is unused/free space.
>
> I appreciate your help,
> Shakeel.
>
> “Ladislav Zezula” wrote in message news:xxxxx@ntfsd…
> > You mean in the user mode or in the kernel mode ?
> >
> > UserMode - GetDiskFreeSpaceEx
> > KernelMode - IRP_MJ_QUERY_VOLUME_INFORMATION
> > with FileFsSizeInformation
> >
> > L.
> >
> >
>
>
>
> —
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https://www.osronline.com/article.cfm?id=17
>
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