Enumerating and mapping SCSI targets

NTDEV
1

I'm pretty sure I'm missing something obvious, so if this is a doofus
question, please excuse the doofusness.

I want to enumerate all of the SCSI devices installed in a system, then open
a handle to some of them. It seems easy enough to enum the devices, devcon
provides a good example of using the SetupDiX API to do this. So how do I
open the same handle I would get if I CreatFile("\\.\PhysicalDrive2"),
given that I get back:
SCSI\DISK&VEN_SEAGATE&PROD_ST19171W&REV_0024\5&5745DE6&0&000
from the SetupDiX functions?

Secondly, from either of these identifiers, is there a simple way to map the
SCSI bus, TID, & LUN? It appears that the blob to the right of the last &
in the hardware ID returned from the SetupDiX API encodes this, is there a
better way than that?

Thanks,

Phil

Philip D. Barila
Seagate Technology, LLC
(720) 684-1842
As if I need to say it: Not speaking for Seagate.

2

You'd want to open the disk device interface on the devnode that you've
found. That should get you the same handle that you'd get with
\.\physicaldriveN

You can send IOCTL_SCSI_GET_ADDRESS if you want ot get the device
address. You should treat the hardware IDs and device interface names
as opaque and not try to interpret them.

-p

-----Original Message-----
From: Phil Barila [mailto:xxxxx@Seagate.com]
Sent: Wednesday, January 08, 2003 1:11 PM
To: NT Developers Interest List

I'm pretty sure I'm missing something obvious, so if this is a doofus
question, please excuse the doofusness.

I want to enumerate all of the SCSI devices installed in a system, then
open a handle to some of them. It seems easy enough to enum the
devices, devcon provides a good example of using the SetupDiX API to do
this. So how do I open the same handle I would get if I
CreatFile("\\.\PhysicalDrive2"),
given that I get back:
SCSI\DISK&VEN_SEAGATE&PROD_ST19171W&REV_0024\5&5745DE6&0&000
from the SetupDiX functions?

Secondly, from either of these identifiers, is there a simple way to map
the SCSI bus, TID, & LUN? It appears that the blob to the right of the
last & in the hardware ID returned from the SetupDiX API encodes this,
is there a better way than that?

Thanks,

Phil

Philip D. Barila
Seagate Technology, LLC
(720) 684-1842
As if I need to say it: Not speaking for Seagate.

You are currently subscribed to ntdev as: xxxxx@microsoft.com To
unsubscribe send a blank email to xxxxx@lists.osr.com

3

Peter,

Thanks for the response. Do you mean SetupDiGetDeviceInterfaceDetail and
CreateFile on the returned DevicePath? I thought I was missing something
obvious. It wasn't immediately obvious to me, even after you pointed me at
it, but is that what you had in mind?

Oh yes. I knew that IOCTL. Glad I could put my failing memory on display
for entertainment purposes. Thanks for the reminder.

Phil

Philip D. Barila
Seagate Technology, LLC
(720) 684-1842
As if I need to say it: Not speaking for Seagate.

"Peter Wieland" wrote in message
news:xxxxx@ntdev...

You'd want to open the disk device interface on the devnode that you've
found. That should get you the same handle that you'd get with
\.\physicaldriveN

You can send IOCTL_SCSI_GET_ADDRESS if you want ot get the device
address. You should treat the hardware IDs and device interface names
as opaque and not try to interpret them.

-p

-----Original Message-----
From: Phil Barila [mailto:xxxxx@Seagate.com]
Sent: Wednesday, January 08, 2003 1:11 PM
To: NT Developers Interest List

I'm pretty sure I'm missing something obvious, so if this is a doofus
question, please excuse the doofusness.

I want to enumerate all of the SCSI devices installed in a system, then
open a handle to some of them. It seems easy enough to enum the
devices, devcon provides a good example of using the SetupDiX API to do
this. So how do I open the same handle I would get if I
CreatFile("\\.\PhysicalDrive2"),
given that I get back:
SCSI\DISK&VEN_SEAGATE&PROD_ST19171W&REV_0024\5&5745DE6&0&000
from the SetupDiX functions?

Secondly, from either of these identifiers, is there a simple way to map
the SCSI bus, TID, & LUN? It appears that the blob to the right of the
last & in the hardware ID returned from the SetupDiX API encodes this,
is there a better way than that?

Thanks,

Phil
--
Philip D. Barila
Seagate Technology, LLC
(720) 684-1842
As if I need to say it: Not speaking for Seagate.

---
You are currently subscribed to ntdev as: xxxxx@microsoft.com To
unsubscribe send a blank email to xxxxx@lists.osr.com

4

Yep - the device path in the sp_device_interface_detail_data is what I
had in mind.

-p

-----Original Message-----
From: Phil Barila [mailto:xxxxx@Seagate.com]
Sent: Wednesday, January 08, 2003 2:43 PM
To: NT Developers Interest List

Peter,

Thanks for the response. Do you mean SetupDiGetDeviceInterfaceDetail
and CreateFile on the returned DevicePath? I thought I was missing
something obvious. It wasn't immediately obvious to me, even after you
pointed me at it, but is that what you had in mind?

Oh yes. I knew that IOCTL. Glad I could put my failing memory on
display for entertainment purposes. Thanks for the reminder.

Phil

Philip D. Barila
Seagate Technology, LLC
(720) 684-1842
As if I need to say it: Not speaking for Seagate.

"Peter Wieland" wrote in message
news:xxxxx@ntdev...

You'd want to open the disk device interface on the devnode that you've
found. That should get you the same handle that you'd get with
\.\physicaldriveN

You can send IOCTL_SCSI_GET_ADDRESS if you want ot get the device
address. You should treat the hardware IDs and device interface names
as opaque and not try to interpret them.

-p

-----Original Message-----
From: Phil Barila [mailto:xxxxx@Seagate.com]
Sent: Wednesday, January 08, 2003 1:11 PM
To: NT Developers Interest List

I'm pretty sure I'm missing something obvious, so if this is a doofus
question, please excuse the doofusness.

I want to enumerate all of the SCSI devices installed in a system, then
open a handle to some of them. It seems easy enough to enum the
devices, devcon provides a good example of using the SetupDiX API to do
this. So how do I open the same handle I would get if I
CreatFile("\\.\PhysicalDrive2"),
given that I get back:
SCSI\DISK&VEN_SEAGATE&PROD_ST19171W&REV_0024\5&5745DE6&0&000
from the SetupDiX functions?

Secondly, from either of these identifiers, is there a simple way to map
the SCSI bus, TID, & LUN? It appears that the blob to the right of the
last & in the hardware ID returned from the SetupDiX API encodes this,
is there a better way than that?

Thanks,

Phil
--
Philip D. Barila
Seagate Technology, LLC
(720) 684-1842
As if I need to say it: Not speaking for Seagate.

---
You are currently subscribed to ntdev as: xxxxx@microsoft.com To
unsubscribe send a blank email to xxxxx@lists.osr.com

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5

Many thanks,

Phil

“Peter Wieland” wrote in message
news:xxxxx@ntdev…

Yep - the device path in the sp_device_interface_detail_data is what I
had in mind.

-p

6

> Secondly, from either of these identifiers, is there a simple way to
map the

SCSI bus, TID, & LUN? It appears that the blob to the right of the
last &

Open and send IOCTL_STORAGE_QUERY_PROPERTY.

Max