How to get Hard Disk number from drive letter

[Zeeshan]

hi,
i want to get the hard drive number for example if if have drive letter C it
should tell me Disk number as 1 and suppose if i have another hard disk
attach to my system having letter J, the by giving J it should give me disk
number 2. Any kind of help will be fuly appreciated

Regards,
Zeeshan

[Greg Young]

This article shows how to get the information I *think* you want through WMI
(i.e. it will tell you C is disk 0 partition 0, scroll about 1/2 way down
for an in depth explanation)
http://www.c-sharpcorner.com/Code/20...t/WMIPart2.asp. Keep in mind that
C: is not a drive, it is a partition C and J could live on the same drive or
could live on different drives ...

I am assuming these numbers are what you want, if not can you be a bit more
clear in what number you are looking for?

Cheers,

Greg Young
MVP - C#
http://codebetter.com/blogs/gregyoung

"Zeeshan" <Ze*****@discus sions.microsoft .comwrote in message
news:31******** *************** ***********@mic rosoft.com...

hi,
i want to get the hard drive number for example if if have drive letter C
it
should tell me Disk number as 1 and suppose if i have another hard disk
attach to my system having letter J, the by giving J it should give me
disk
number 2. Any kind of help will be fuly appreciated

Regards,
Zeeshan

[Zeeshan]

Thanx for answering. I think you didnt get my question but as i solved my
problem , it like that

HANDLE hDeviceHandle = NULL;
char drive[] = {'\\', '\\', '.', '\\', 'A', ':', 0};
DWORD driveMask = GetLogicalDrive s();
for(int i = 0; i < 26; i++)
{
BOOL b = (driveMask & 1);
if( b )
{
drive[4] = 'A' + i;
//printf("Drive: %s\n", drive);
hDeviceHandle = CreateFile(driv e , 0, 0, NULL,
OPEN_EXISTING,F ILE_ATTRIBUTE_N ORMAL, NULL);
if (hDeviceHandle != (HANDLE)-1)
{
STORAGE_DEVICE_ NUMBER sdn;
DWORD returned;
if (DeviceIoContro l(
hDeviceHandle,I OCTL_STORAGE_GE T_DEVICE_NUMBER ,NULL,0,&sdn,si zeof(sdn),&retu rned,NULL));
{
printf("\tDevic e type: %d number: %d partition: %d\n",sdn.Devic eType,
sdn.DeviceNumbe r, sdn.PartitionNu mber);
}
}
}
}

Regards :)

[Greg Young]

This is the exact same information WMI gives you that I posted (did you read
through until about 1/2 way down where it explains how disk information
works?).. Device type is on win32_diskparti tion ... it explains the mapping
with the logicaldisk record ..here is some simple code it was leading
towards as an example (it explained the associators etc).

using System;
using System.Collecti ons.Generic;
using System.Text;
using System.Manageme nt;
namespace ConsoleApplicat ion31 {
class Program {
static void Main(string[] args) {
ManagementScope scope = new ManagementScope (@"\root\cimv2" );
ObjectQuery query = new ObjectQuery("se lect * from
Win32_DiskParti tion");
ManagementObjec tSearcher searcher = new
ManagementObjec tSearcher(scope , query);
ManagementObjec tCollection drives = searcher.Get();
foreach (ManagementObje ct current in drives) {
Console.WriteLi ne("device id = " + current["deviceid"]);
ObjectQuery associators = new ObjectQuery("AS SOCIATORS OF
{Win32_DiskPart ition.DeviceID= \"" + current["deviceid"] + "\"} where
assocclass=Win3 2_LogicalDiskTo Partition");
searcher = new ManagementObjec tSearcher(scope , associators);
ManagementObjec tCollection disks = searcher.Get();
foreach (ManagementObje ct disk in disks) {
Console.WriteLi ne("\tdevice id = " + disk["deviceid"]);
}
}
}
}
}
Cheers,

Greg Young
MVP C#
http://codebetter.com/blogs/gregyoung

"Zeeshan" <Ze*****@discus sions.microsoft .comwrote in message
news:BF******** *************** ***********@mic rosoft.com...

Thanx for answering. I think you didnt get my question but as i solved my
problem , it like that

HANDLE hDeviceHandle = NULL;
char drive[] = {'\\', '\\', '.', '\\', 'A', ':', 0};
DWORD driveMask = GetLogicalDrive s();
for(int i = 0; i < 26; i++)
{
BOOL b = (driveMask & 1);
if( b )
{
drive[4] = 'A' + i;
//printf("Drive: %s\n", drive);
hDeviceHandle = CreateFile(driv e , 0, 0, NULL,
OPEN_EXISTING,F ILE_ATTRIBUTE_N ORMAL, NULL);
if (hDeviceHandle != (HANDLE)-1)
{
STORAGE_DEVICE_ NUMBER sdn;
DWORD returned;
if (DeviceIoContro l(
hDeviceHandle,I OCTL_STORAGE_GE T_DEVICE_NUMBER ,NULL,0,&sdn,si zeof(sdn),&retu rned,NULL));
{
printf("\tDevic e type: %d number: %d partition: %d\n",sdn.Devic eType,
sdn.DeviceNumbe r, sdn.PartitionNu mber);
}
}
}
}

Regards :)

[Greg Young]

sorry in typing it in I switched the order .. but same idea.
"Greg Young" <dr************ *******@hotmail .comwrote in message
news:O0******** ******@TK2MSFTN GP04.phx.gbl...

This is the exact same information WMI gives you that I posted (did you
read through until about 1/2 way down where it explains how disk
information works?).. Device type is on win32_diskparti tion ... it
explains the mapping with the logicaldisk record ..here is some simple
code it was leading towards as an example (it explained the associators
etc).

using System;
using System.Collecti ons.Generic;
using System.Text;
using System.Manageme nt;
namespace ConsoleApplicat ion31 {
class Program {
static void Main(string[] args) {
ManagementScope scope = new ManagementScope (@"\root\cimv2" );
ObjectQuery query = new ObjectQuery("se lect * from
Win32_DiskParti tion");
ManagementObjec tSearcher searcher = new
ManagementObjec tSearcher(scope , query);
ManagementObjec tCollection drives = searcher.Get();
foreach (ManagementObje ct current in drives) {
Console.WriteLi ne("device id = " + current["deviceid"]);
ObjectQuery associators = new ObjectQuery("AS SOCIATORS OF
{Win32_DiskPart ition.DeviceID= \"" + current["deviceid"] + "\"} where
assocclass=Win3 2_LogicalDiskTo Partition");
searcher = new ManagementObjec tSearcher(scope ,
associators);
ManagementObjec tCollection disks = searcher.Get();
foreach (ManagementObje ct disk in disks) {
Console.WriteLi ne("\tdevice id = " + disk["deviceid"]);
}
}
}
}
}
Cheers,

Greg Young
MVP C#
http://codebetter.com/blogs/gregyoung

"Zeeshan" <Ze*****@discus sions.microsoft .comwrote in message
news:BF******** *************** ***********@mic rosoft.com...

>Thanx for answering. I think you didnt get my question but as i solved my
problem , it like that

HANDLE hDeviceHandle = NULL;
char drive[] = {'\\', '\\', '.', '\\', 'A', ':', 0};
DWORD driveMask = GetLogicalDrive s();
for(int i = 0; i < 26; i++)
{
BOOL b = (driveMask & 1);
if( b )
{
drive[4] = 'A' + i;
//printf("Drive: %s\n", drive);
hDeviceHandl e = CreateFile(driv e , 0, 0, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_ NORMAL, NULL);
if (hDeviceHandle != (HANDLE)-1)
{
STORAGE_DEVICE _NUMBER sdn;
DWORD returned;
if (DeviceIoContro l(
hDeviceHandle, IOCTL_STORAGE_G ET_DEVICE_NUMBE R,NULL,0,&sdn,s izeof(sdn),&ret urned,NULL));
{
printf("\tDevi ce type: %d number: %d partition: %d\n",sdn.Devic eType,
sdn.DeviceNumb er, sdn.PartitionNu mber);
}
}
}
}

Regards :)