Disk Lower Filter Driver

NTDEV
1

Hi

I am able to trace SRB’s for Disk Class Lower Fitler Driver.

Can I find out which partiton the LBA belongs to and also the Volume .

Not sure where to find this info in the SRB :frowning:

Thanks,
Manohara

2

SRBs have nothing but an LBA. Partitions and their related volumes are a
higher level abstraction. You can map the partitions on a disk to LBAs
using user mode storage/volume apis.

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of
xxxxx@hotmail.com
Sent: Monday, August 28, 2006 1:16 PM
To: Windows System Software Devs Interest List
Subject: [ntdev] Disk Lower Filter Driver

Hi

I am able to trace SRB’s for Disk Class Lower Fitler Driver.

Can I find out which partiton the LBA belongs to and also the Volume .

Not sure where to find this info in the SRB :frowning:

Thanks,
Manohara

Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

3

> Can I find out which partiton the LBA belongs to and also the Volume .

Not sure where to find this info in the SRB :frowning:

Read the partition table yourself using handicrafted SRBs, or analyze the data
from the passing-by SRBs which touch sector 0 and are initiated above you.

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

4

To OP, be advised, there’s more than one kind of partition table. There’s the old MBR-style partition table (“basic disks”), and the new GUID-style (“dynamic disks”). The partition table type can be upgraded / downgraded on the fly, also.

– arlie

-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of Maxim S. Shatskih
Sent: Monday, August 28, 2006 4:03 PM
To: Windows System Software Devs Interest List
Subject: Re: [ntdev] Disk Lower Filter Driver

Can I find out which partiton the LBA belongs to and also the Volume .

Not sure where to find this info in the SRB :frowning:

Read the partition table yourself using handicrafted SRBs, or analyze the data from the passing-by SRBs which touch sector 0 and are initiated above you.

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

Questions? First check the Kernel Driver FAQ at http://www.osronline.com/article.cfm?id=256

To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer

5

>To OP, be advised, there’s more than one kind of partition table. There’s the
old

MBR-style partition table (“basic disks”), and the new GUID-style (“dynamic ?
disks”). The partition table type can be upgraded / downgraded on the fly,
also.

Three kinds: MBR, Dynamic Disk (undocumented) and the new GUID-based (GPT,
starts from Server 2003 and is connected to EFI standard, I think that GPT is
documented somewhere).

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