Question about Mounting Procedure

NTFSD
1

I have a file system that I am running on a system in which the file system
is mounted on a single disk. That disk is partitioned with a single
partition occupying the entire disk.

I have observed that the IRP_MN_MOUNT_VOLUME IOCTL of my File system is
being called twice. Once with the device object for the partition and a
second time with the device object for the entire disk. Is there a reason
for this second IRP_MN_MOUNT_VOLUME call? Is there anything in particluar
that I am supposed to do with it?

Thanks,

Don

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2

You have to rejet the call for the entire disk
because the format of MBR and subsequent fields
should not be proper for your file system in any
case. This is what every standard FSD does in mount;
check the on-disk structure and if it is not the
expected one fail the call with STATUS_UNRECOGNIZED_VOLUME.

Hope this helps.
Paul

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of xxxxx@pinnaclesys.com
Sent: Thursday, December 20, 2001 2:44 PM
To: File Systems Developers
Subject: [ntfsd] Question about Mounting Procedure

I have a file system that I am running on a system in which the file system
is mounted on a single disk. That disk is partitioned with a single
partition occupying the entire disk.

I have observed that the IRP_MN_MOUNT_VOLUME IOCTL of my File system is
being called twice. Once with the device object for the partition and a
second time with the device object for the entire disk. Is there a reason
for this second IRP_MN_MOUNT_VOLUME call? Is there anything in particluar
that I am supposed to do with it?

Thanks,

Don

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