VOLUME_BITMAP and Bad Clusters

NTFSD
1

Hi,
I am writing a user space program to open a drive / volume and
get the used blocks on the system. My question is , does the
volume_bitmap return the bad clusters on the volume also , or are they
mapped out to the BadClus file and are flagged as unused ? Also, what
is the format of the BadClus file and is there a way to get the list
of bad clusters on a volume ?

Thanks,
Sameer.

2

Surely the bad blocks are mapped as used, it is so for any filesystem I
know.

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

----- Original Message -----
From: “Sameer Kamat”
To: “Windows File Systems Devs Interest List”
Sent: Tuesday, January 25, 2005 7:02 PM
Subject: [ntfsd] VOLUME_BITMAP and Bad Clusters

> Hi,
> I am writing a user space program to open a drive / volume and
> get the used blocks on the system. My question is , does the
> volume_bitmap return the bad clusters on the volume also , or are they
> mapped out to the BadClus file and are flagged as unused ? Also, what
> is the format of the BadClus file and is there a way to get the list
> of bad clusters on a volume ?
>
> Thanks,
> Sameer.
>
> —
> Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com

3

So if I go through the volume bitmap and read every block I will run
into a bad block. In that case how can I skip over the bad blocks, is
there a bitmap of bad blocks too ? Would the $BadClus file be of any
help here ?

Thanks,
Sameer

On Tue, 25 Jan 2005 22:58:26 +0300, Maxim S. Shatskih
wrote:
> Surely the bad blocks are mapped as used, it is so for any filesystem I
> know.
>
> Maxim Shatskih, Windows DDK MVP
> StorageCraft Corporation
> xxxxx@storagecraft.com
> http://www.storagecraft.com
>
> ----- Original Message -----
> From: “Sameer Kamat”
> To: “Windows File Systems Devs Interest List”
> Sent: Tuesday, January 25, 2005 7:02 PM
> Subject: [ntfsd] VOLUME_BITMAP and Bad Clusters
>
> > Hi,
> > I am writing a user space program to open a drive / volume and
> > get the used blocks on the system. My question is , does the
> > volume_bitmap return the bad clusters on the volume also , or are they
> > mapped out to the BadClus file and are flagged as unused ? Also, what
> > is the format of the BadClus file and is there a way to get the list
> > of bad clusters on a volume ?
> >
> > Thanks,
> > Sameer.
> >
> > —
> > Questions? First check the IFS FAQ at
> https://www.osronline.com/article.cfm?id=17
> >
> > You are currently subscribed to ntfsd as: xxxxx@storagecraft.com
> > To unsubscribe send a blank email to xxxxx@lists.osr.com
>
> —
> Questions? First check the IFS FAQ at https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: xxxxx@gmail.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com
>