** How to get physical drivenumber from logical drive letter **

NTDEV
1

Hi All,

This may be old DOS goodies that someone remembers.

How to physical drive number from logical driver letter. Let say I am booting from Bootable CD
and C: is assigned to CD ROM, D: is assigned to hard disk. In general C: is assigned to first
physical hard drive and, physical drive number assigned to it 0x80.
But for above mentined case if I say D: it is same physical drive number 0x80.

So how do I intrepret d: as 0x80 physical driver number ? Which DOS interrupt services is useful ?

Waiting for reply
8^)
Rajesh

2

check int 13h Interrupt Jump Table

Regards,
Satish K.S
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of Rajesh Nikam
Sent: Thursday, August 26, 2004 1:48 PM
To: Windows System Software Devs Interest List
Subject: [ntdev] ** How to get physical drivenumber from logical drive
letter **

Hi All,

This may be old DOS goodies that someone remembers.

How to physical drive number from logical driver letter. Let say I am
booting from Bootable CD
and C: is assigned to CD ROM, D: is assigned to hard disk. In general C:
is assigned to first
physical hard drive and, physical drive number assigned to it 0x80.
But for above mentined case if I say D: it is same physical drive number
0x80.

So how do I intrepret d: as 0x80 physical driver number ? Which DOS
interrupt services is useful ?

Waiting for reply
8^)
Rajesh

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

You are currently subscribed to ntdev as: unknown lmsubst tag argument: ''
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3

Hi,

Could you be more specific on service number for INT 13?
I am confused which service would more appropriate.

Thanks in advance.
8^)
Rajesh

----- Original Message -----
From: int3
To: Windows System Software Devs Interest List
Sent: Thursday, August 26, 2004 2:42 PM
Subject: RE: [ntdev] ** How to get physical drivenumber from logical drive letter **

check int 13h Interrupt Jump Table

Regards,
Satish K.S
-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com]On Behalf Of Rajesh Nikam
Sent: Thursday, August 26, 2004 1:48 PM
To: Windows System Software Devs Interest List
Subject: [ntdev] ** How to get physical drivenumber from logical drive letter **

Hi All,

This may be old DOS goodies that someone remembers.

How to physical drive number from logical driver letter. Let say I am booting from Bootable CD
and C: is assigned to CD ROM, D: is assigned to hard disk. In general C: is assigned to first
physical hard drive and, physical drive number assigned to it 0x80.
But for above mentined case if I say D: it is same physical drive number 0x80.

So how do I intrepret d: as 0x80 physical driver number ? Which DOS interrupt services is useful ?

Waiting for reply
8^)
Rajesh

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

You are currently subscribed to ntdev as: unknown lmsubst tag argument: ''
To unsubscribe send a blank email to xxxxx@lists.osr.com

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

You are currently subscribed to ntdev as: unknown lmsubst tag argument: ''
To unsubscribe send a blank email to xxxxx@lists.osr.com