Re: Virtual disk with a bus enumerator (SRB_FUNCTION_- CLAIM_DEVICE) ?

OSR_Community_User · July 3, 2001, 8:18am

There is more going on here than you realize. Once a new disk (with a new
disk signature) is installed on a W2K system, the Disk Manager will attempt
to remove it, meaning that your bus driver will receive IRP_MN_QUERY_REMOVE
and IRP_MN_REMOVE PnP Irps. This is so that the storage device stack can
be rebuilt properly. Therefore, when your PDO receives the IRP_MN_REMOVE,
you must not deleted your PDO. Just clear the claimed flag and reset your
PNP device state to NotStarted. Eventually your PDO will receive another
IRP_MN_START_DEVICE.

-----Original Message-----
From: xxxxx@hotmail.com [mailto:xxxxx@hotmail.com]

Sent: Tuesday, July 03, 2001 3:55 AM
To: NT Developers Interest List
Subject: [ntdev] Re: Virtual disk with a bus enumerator
(SRB_FUNCTION_CLAIM_DEVICE) ?

Hi,

You have to implement a couple of IOCTLs in your code as well. At least
IOCTL_STORAGE_QUERY_PROPERTY. See the source of the disk class driver in
DDK for this. Other IOCTLs are optional (as IOCTL_SCSI_GET_ADDRESS,
IOCTL_DISK_GET_DRIVE_GEOMETRY etc).

Regards,
Anton Kolomyeytsev

On 07/02/01, ““Zoltan Csizmadia” ” wrote:
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> I have a bus enumerator based on the Toaster sample.
> I return =93DETECTED\FakeDisk=94 for deviceID, and =93GenDisk=94 for
> CompatibleId. It works fine. The Pnp manager finds my fake disk drive
> add to the device list, and send me an=20
> SRB_FUNCTION_CLAIM_DEVICE message (IRP_MJ_SCSI). I just return a
> STATUS_SUCCESS status, and then the Pnp manager says I have to reboot
> the system. That means I don=92t get more SRB_FUNCTIONs. I checked the
> disk class driver source code in the DDK, and seems it doesn=92t need =
> more
> response for CLAIM_DEVICE, just the status.
> =20
> How can I avoid the reboot?
> =20
> As I remember Anton Kolomyeytsev asked similar question a few days ago,
> but I couldn=92t find the answers.=20
> =20
> Regards,
> =20
> Zoltan
> =20
> Ps:=20
> =20
> Anton,
> =20
> Maybe you can help me with this problem.
>
>
> —
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> style=3D’font-size:10.0pt; font-family:Arial’>I > class=3DGramE>have=A0
> a bus enumerator based on the Toaster =
> sample.<o:p></o:p>

>
>

> style=3D’font-size:10.0pt; font-family:Arial’>I return
> “DETECTED\FakeDisk” for > class=3DGramE>deviceID, and “GenDisk” for =
> CompatibleId. It works fine.<o:p></o:p>

>
>

> style=3D’font-size:10.0pt; font-family:Arial’>The Pnp manager finds my
> fake disk drive add to the = device
> list, and send me an <o:p></o:p>

>
>

> style=3D’font-size:10.0pt;
> font-family:Arial’>SRB_FUNCTION_CLAIM_DEVICE message (IRP_MJ_SCSI). I
> = just return a STATUS_SUCCESS status, and then the Pnp manager says I
> have to = reboot
> the system. That means I don’t get more SRB_FUNCTIONs. I checked =
> the disk
> class driver source code in the DDK, and > class=3DGramE>seems it
> doesn’t need more response for CLAIM_DEVICE, just the =
> status.<o:p></o:p>

>
>