在xp下如何同时显示我的U盘的两个分区的盘符？？？？
大大们，请教了， 我在做U盘加解密这一块，现在就差分区这一块了，分区完了，可是又不能同时显示两个分区的盘符。
boss逼得我都快想跳楼了。郁闷啊。。。。。

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生活就是工作，工作就是生活--对我来说足以！

如果 USB 隨身碟只有一個分割, 判斷 磁碟代號的方法如下
如果您研究出多分割的判斷法, 希望可以分享一下

偵測USB儲存裝置的插拔和磁碟代號(含SourceCode)
http://delphi.ktop.com.tw/board.php?cid=31&fid=79&tid=91493
[code cpp]
{
程式說明 : 用 WM_DEVICECHANGE 和 DBT_DEVICEARRIVAL 偵測 USB 儲存裝置的插拔
並且顯示出剛剛插入的 USB Flash 磁碟代號
開發工具 : Delphi 7 Enterprise
參考 :
http://delphi.ktop.com.tw/board.php?cid=168&fid=917&tid=58642
http://forums.adelavida.com/?Idx=delphi&Status=9865306168
http://www.amxku.net/?action=show&id=801
}
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Memo1: TMemo;
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
OldWindowProc: TWndMethod;
procedure FormWndProc(var Message: TMessage);
public
{ Public declarations }
end;
var
Form1: TForm1;

implementation
{$R *.dfm}
uses
ShellApi;
const
DBT_DEVICEARRIVAL = $8000; // system detected a new device
DBT_DEVICEREMOVECOMPLETE = $8004; // device is gone
DBT_DEVTYP_VOLUME = $00000002; // logical volume
DBTF_MEDIA = $0001; // media comings and goings
type
PDEV_BROADCAST_HDR = ^TDEV_BROADCAST_HDR;
TDEV_BROADCAST_HDR = packed record
dbch_size : DWORD;
dbch_devicetype : DWORD;
dbch_reserved : DWORD;
end;
PDEV_BROADCAST_VOLUME = ^TDEV_BROADCAST_VOLUME;
TDEV_BROADCAST_VOLUME = packed record
dbcv_size : DWORD;
dbcv_devicetype : DWORD;
dbcv_reserved : DWORD;
dbcv_unitmask : DWORD;
dbcv_flags : WORD;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
OldWindowProc:= WindowProc;
WindowProc := FormWndProc;
end;
procedure TForm1.FormWndProc(var Message: TMessage);
var
lpdb : PDEV_BROADCAST_HDR;
lpdbv : PDEV_BROADCAST_VOLUME;
unitmask:DWORD;
i: Integer;
begin
lpdb := PDEV_BROADCAST_HDR(Message.LParam);
OldWindowProc(Message);
if (Message.Msg=WM_DEVICECHANGE) then
begin
if (Message.WParam=DBT_DEVICEARRIVAL) then
begin
Memo1.Lines.Add('新插入了一項裝置!');
if lpdb.dbch_devicetype=DBT_DEVTYP_VOLUME then
begin
lpdbv := PDEV_BROADCAST_VOLUME(lpdb);
unitmask:=lpdbv.dbcv_unitmask;//取得 USB 隨身碟的磁碟代號
for i:=0 to 25 do //遍?磁?
begin
if Boolean(unitmask and $1)then
break;
unitmask := unitmask shr 1;
end;
Memo1.Lines.Add('USB 隨身碟的磁碟代號 : ' Char(Ord('A') i) );
end;
end;
if (Message.WParam=DBT_DEVICEREMOVECOMPLETE) then
begin
Memo1.Lines.Add('卸除了一項裝置!');
end;
end;
end;
end.
[/code]

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能力不足，求助於人；有能力時，幫幫別人；如果您滿意答覆，請適時結案！

子曰：問有三種，不懂則問，雖懂有疑則問，雖懂而想知更多則問！

編輯記錄

U盤 是單指 USB 隨身碟 ? 單指 USB 硬碟 ? 泛指 USB 隨身碟 and USB 硬碟 ?

小弟在 [檔案總管] 的 [我的電腦] 按下滑鼠右鍵, 選 [管理]
選 [磁碟管理], 在 USB 隨身碟的 區塊上按下滑鼠右鍵, [刪除磁碟分割] 是 灰色的
在 USB 硬碟的 區塊上按下滑鼠右鍵, [刪除磁碟分割] 是可用的
請問您使用哪套軟體或方法將 USB 隨身碟做分割 ?
     PS: 小弟 USB HD 上很多資料, 不能砍了做測試

------
能力不足，求助於人；有能力時，幫幫別人；如果您滿意答覆，請適時結案！

子曰：問有三種，不懂則問，雖懂有疑則問，雖懂而想知更多則問！

我指的是：USB 隨身碟，即在windows下默认只有一个分区的U盘，不是移动硬盘；
我已经实现了在默认时只显示一个分区的USB隨身碟上分出多个区来，但windows2000、xp、2003都只认USB隨身碟的首分区，剩下的分区都不认，我不知道该怎么做？？？
查过网络上的资料，说受限于windows自身的USB驱动中的getmaxlun，lun总是返回1，表示只有一个分区可用，那么U盘的的多个分区只被windows认出第一个分区，其他的分区无效。
我的想法是修改返回的lun只，就是不知道在哪儿修改，deviceiocontrol可行否？？？？还是在驱动中修改（如果是的话，在什么驱动中修改，如文件系统过滤驱动（呵呵，我只知道文件系统过滤驱动，因为我做加解密的））
我已经实现了USB隨身碟的整盘加解密，现在需要分区的支持
帮帮我啊

------
生活就是工作，工作就是生活--对我来说足以！

> 我已經實現了在默認時只顯示一個分區的USB隨身碟上分出多個區來
怎麼做的 ?

------
能力不足，求助於人；有能力時，幫幫別人；如果您滿意答覆，請適時結案！

子曰：問有三種，不懂則問，雖懂有疑則問，雖懂而想知更多則問！

回楼上的
自己用vc编写的程序
利用deviceiocontrol
我在问问题啊，结果。。。郁闷
楼上的，给你我的代码，就一个函数，自己看：（对了调用此函数diskno一定不要是0，diskno表示存储设备的顺序0一般都是系统盘）
BOOL usb_fdisk_for_ori(int diskno)
{
PARTITION_INFORMATION_EX arraypartinfn_x[3];
DRIVE_LAYOUT_INFORMATION_EX* drivelayout_x;
LPDWORD lpBytesReturned;
char szTmp[260];
DWORD junk = 0;
CREATE_DISK crtdisk;
BOOL flag;
DISK_GEOMETRY diskGeometry;
int nDosLinkCreated;
char szDosDevice[260], szCFDevice[260];
DWORD dwCB;
BYTE lpSectBuff[513] = {0};
BOOT * BootRecord;
PARTITION * PartitionTable;
DRIVE_LAYOUT_INFORMATION_EX *temp = NULL;
char cserr[256], osver[2];

FunGetOSVersion(osver);
DWORD szNewLayout = sizeof(DRIVE_LAYOUT_INFORMATION_EX) 4*sizeof(PARTITION_INFORMATION_EX);
drivelayout_x = (DRIVE_LAYOUT_INFORMATION_EX*) new BYTE[szNewLayout];
if (drivelayout_x == NULL)
{
return FALSE;
}

ZeroMemory(drivelayout_x, szNewLayout);
memset(szTmp, 0, sizeof(szTmp));
sprintf (szTmp, "\\Device\\Harddisk%d\\Partition%d", diskno, 0);
nDosLinkCreated = UCSFakeDosNameForDevice (szTmp, szDosDevice,szCFDevice, FALSE);
HANDLE volumeHandle = CreateFile(szCFDevice,GENERIC_READ | GENERIC_WRITE ,
FILE_SHARE_READ | FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,NULL);
if (volumeHandle == INVALID_HANDLE_VALUE)
{
//cout<<"error in opening device";
DefineDosDevice (DDD_RAW_TARGET_PATH | DDD_EXACT_MATCH_ON_REMOVE |
DDD_REMOVE_DEFINITION, szDosDevice, szTmp);
return FALSE;
}
DefineDosDevice (DDD_RAW_TARGET_PATH | DDD_EXACT_MATCH_ON_REMOVE |
DDD_REMOVE_DEFINITION, szDosDevice, szTmp);

SetFilePointer(volumeHandle, 0, 0, FILE_BEGIN);

ReadFile(volumeHandle, lpSectBuff, 512, &dwCB, NULL);
BootRecord = (BOOT *) lpSectBuff;
PartitionTable = (PARTITION *) (lpSectBuff 0x1BE);

flag = DeviceIoControl(
(HANDLE) volumeHandle, // handle to device
IOCTL_DISK_GET_DRIVE_GEOMETRY, // dwIoControlCode
NULL, // lpInBuffer
0, // nInBufferSize
(LPVOID) &diskGeometry, // output buffer
(DWORD) sizeof(diskGeometry), // size of output buffer
(LPDWORD) &lpBytesReturned, // number of bytes returned
NULL // OVERLAPPED structure
);
if(flag == FALSE)
{
//PrintWin32Error( L"get geometry with error", GetLastError());
sprintf(cserr, "get geometry with error%d ", GetLastError());
MessageBox( NULL, cserr, "分区错误提示", MB_OK );
goto error;
}
WriteTracks(volumeHandle,&diskGeometry);
temp = (DRIVE_LAYOUT_INFORMATION_EX*) new BYTE[szNewLayout];

if(osver[0] == '0')
{
flag = DeviceIoControl(
(HANDLE) volumeHandle, // handle to device
IOCTL_DISK_GET_DRIVE_LAYOUT, // dwIoControlCode
NULL, // lpInBuffer
0, // nInBufferSize
(LPVOID) temp, // output buffer
(DWORD) szNewLayout, // size of output buffer
(LPDWORD) &lpBytesReturned, // number of bytes returned
(LPOVERLAPPED) NULL // OVERLAPPED structure
);
if(flag == FALSE)
{
//PrintWin32Error( L"get drive_x layout with error ", GetLastError());
sprintf(cserr, "get drive_x layout with error%d ", GetLastError());
MessageBox( NULL, cserr, "分区错误提示", MB_OK );
goto error;
}
} else {
flag = DeviceIoControl(
(HANDLE) volumeHandle, // handle to device
IOCTL_DISK_GET_DRIVE_LAYOUT_EX, // dwIoControlCode
NULL, // lpInBuffer
0, // nInBufferSize
(LPVOID) temp, // output buffer
(DWORD) szNewLayout, // size of output buffer
(LPDWORD) &lpBytesReturned, // number of bytes returned
(LPOVERLAPPED) NULL // OVERLAPPED structure
);
if(flag == FALSE)
{
//PrintWin32Error( L"get drive_x layout with error ", GetLastError());
sprintf(cserr, "get drive_x layout with error%d ", GetLastError());
MessageBox( NULL, cserr, "分区错误提示", MB_OK );
goto error;
}
}
crtdisk.PartitionStyle = PARTITION_STYLE_MBR;
if(osver[0] != '0')
{
flag = DeviceIoControl(
(HANDLE) volumeHandle, // handle to device
IOCTL_DISK_CREATE_DISK, // dwIoControlCode
(LPVOID) &crtdisk, // input buffer
(DWORD) sizeof(CREATE_DISK), // size of input buffer
NULL, // lpOutBuffer
0, // nOutBufferSize
(LPDWORD) &lpBytesReturned, // number of bytes returned
(LPOVERLAPPED)NULL // OVERLAPPED structure
);
if(flag == FALSE)
{
//PrintWin32Error( L"create disk with error ", GetLastError());
sprintf(cserr, "create disk with error%d ", GetLastError());
MessageBox( NULL, cserr, "分区错误提示", MB_OK );
goto error;
}
}
DWORD VirtBufSize;
//大小
VirtBufSize = (diskGeometry. TracksPerCylinder)*
(diskGeometry. SectorsPerTrack) *
(diskGeometry. BytesPerSector)*
diskGeometry.Cylinders.QuadPart;
arraypartinfn_x[0].PartitionNumber = 0;
arraypartinfn_x[0].StartingOffset.QuadPart = PUBPARTITION_START;

arraypartinfn_x[0].PartitionLength.QuadPart = // PUBPARTITION_START;//((((diskGeometry.Cylinders.QuadPart * diskGeometry.TracksPerCylinder)* diskGeometry.SectorsPerTrack)) * diskGeometry.BytesPerSector) - 1024*1024*10 - SYSREVERS_SIZE;
(PUBPARTITION_SIZE);//SYSREVERS_SIZE;//SYSREVERS_SIZE; //32k bytes

arraypartinfn_x[0].Mbr.BootIndicator = FALSE;

arraypartinfn_x[0].Mbr.RecognizedPartition = TRUE;

arraypartinfn_x[0].Mbr.HiddenSectors = 32;//(arraypartinfn_x[0].StartingOffset.QuadPart - 1)/diskGeometry.BytesPerSector;

arraypartinfn_x[0].Mbr.PartitionType = PARTITION_FAT_16;
arraypartinfn_x[0].RewritePartition =TRUE;

arraypartinfn_x[0].PartitionStyle = PARTITION_STYLE_MBR;

arraypartinfn_x[1].PartitionNumber = 1;

arraypartinfn_x[1].StartingOffset.QuadPart = PUBPARTITION_START PUBPARTITION_SIZE;

arraypartinfn_x[1].PartitionLength.QuadPart = // PUBPARTITION_START;//((((diskGeometry.Cylinders.QuadPart * diskGeometry.TracksPerCylinder)* diskGeometry.SectorsPerTrack)) * diskGeometry.BytesPerSector) - 1024*1024*10 - SYSREVERS_SIZE;
(PUBPARTITION_SIZE*2);//SYSREVERS_SIZE;//SYSREVERS_SIZE; //32k bytes

arraypartinfn_x[1].Mbr.BootIndicator = FALSE;

arraypartinfn_x[1].Mbr.RecognizedPartition = TRUE;

arraypartinfn_x[1].Mbr.HiddenSectors = 0;//(arraypartinfn_x[0].StartingOffset.QuadPart - 1)/diskGeometry.BytesPerSector;

arraypartinfn_x[1].Mbr.PartitionType = PARTITION_FAT_16;

arraypartinfn_x[1].RewritePartition =TRUE;

arraypartinfn_x[1].PartitionStyle = PARTITION_STYLE_MBR;


drivelayout_x->PartitionCount = 2;
drivelayout_x->PartitionEntry[0] = arraypartinfn_x[0];
drivelayout_x->PartitionEntry[1] = arraypartinfn_x[1];

drivelayout_x->PartitionStyle = PARTITION_STYLE_MBR;

DRIVE_LAYOUT_INFORMATION_MBR mbrlayout;

mbrlayout.Signature = temp->Mbr.Signature;

drivelayout_x->Mbr = mbrlayout;

if(osver[0] == '0')
{
flag = DeviceIoControl(
(HANDLE) volumeHandle, // handle to device
IOCTL_DISK_SET_DRIVE_LAYOUT_EX, // dwIoControlCode
(LPVOID) drivelayout_x, // input buffer
(DWORD) szNewLayout, // size of input buffer
NULL, // lpOutBuffer
0, // nOutBufferSize
(LPDWORD) &lpBytesReturned, // number of bytes returned
(LPOVERLAPPED) NULL // OVERLAPPED structure
);
if(flag == FALSE)
{
//PrintWin32Error( L"set drive_x layout with error ", GetLastError());
sprintf(cserr, "set drive_x layout with error2000%d ", GetLastError());
MessageBox( NULL, cserr, "分区错误提示", MB_OK );
goto error;
}
} else {
flag = DeviceIoControl(
(HANDLE) volumeHandle, // handle to device
IOCTL_DISK_SET_DRIVE_LAYOUT_EX, // dwIoControlCode
(LPVOID) drivelayout_x, // input buffer
(DWORD) szNewLayout, // size of input buffer
NULL, // lpOutBuffer
0, // nOutBufferSize
(LPDWORD) &lpBytesReturned, // number of bytes returned
(LPOVERLAPPED) NULL // OVERLAPPED structure
);
if(flag == FALSE)
{
//PrintWin32Error( L"set drive_x layout with error ", GetLastError());
sprintf(cserr, "set drive_x layout with errorxp ro 2003%d ", GetLastError());
MessageBox( NULL, cserr, "分区错误提示", MB_OK );
goto error;
}
}

VERIFY_INFORMATION verify;
verify.Length = ((((diskGeometry.Cylinders.QuadPart *
diskGeometry.TracksPerCylinder)*
diskGeometry.SectorsPerTrack)) *
diskGeometry.BytesPerSector);
verify.StartingOffset.QuadPart = SYSREVERS_SIZE;
flag = DeviceIoControl(
(HANDLE) volumeHandle, // handle to device
IOCTL_DISK_VERIFY, // dwIoControlCode
(LPVOID) &verify, // input buffer
(DWORD) sizeof(VERIFY_INFORMATION), // size of input buffer
NULL, // lpOutBuffer
0, // nOutBufferSize
(LPDWORD) &lpBytesReturned, // number of bytes returned
(LPOVERLAPPED) NULL // OVERLAPPED structure
);
if(flag == FALSE)
{
//PrintWin32Error( L"verify disk with error ", GetLastError());
sprintf(cserr, "verify disk with error %d ", GetLastError());
MessageBox( NULL, cserr, "分区错误提示", MB_OK );
goto error;
}
if(osver[0] != '0')
{
flag = DeviceIoControl(
(HANDLE) volumeHandle, // handle to device
IOCTL_DISK_UPDATE_PROPERTIES,// dwIoControlCode
NULL, // lpInBuffer
0, // nInBufferSize
NULL, // lpOutBuffer
0, // nOutBufferSize
(LPDWORD)&lpBytesReturned, // lpBytesReturned
(LPOVERLAPPED)NULL // lpOverlapped
);
if(flag == FALSE)
{
sprintf(cserr, "update propertioes with error%d ", GetLastError());
MessageBox( NULL, cserr, "分区错误提示", MB_OK );
goto error;
}

flag = DeviceIoControl(
(HANDLE) volumeHandle, // handle to device
IOCTL_DISK_UPDATE_PROPERTIES,// dwIoControlCode
NULL, // lpInBuffer
0, // nInBufferSize
NULL, // lpOutBuffer
0, // nOutBufferSize
(LPDWORD)&lpBytesReturned, // lpBytesReturned
(LPOVERLAPPED)NULL // lpOverlapped
);
if(flag == FALSE)
{
//PrintWin32Error( L"update propertioes with error ", GetLastError());
sprintf(cserr, "update propertioes with error%d ", GetLastError());
MessageBox( NULL, cserr, "分区错误提示", MB_OK );
goto error;
}
}
CloseHandle(volumeHandle);

delete drivelayout_x;
delete temp;

return TRUE;
error:
CloseHandle(volumeHandle);
delete drivelayout_x;
delete temp;
return FALSE;
}

------
生活就是工作，工作就是生活--对我来说足以！

上面的函数可以直接使用，功能：分两个区：
1：2M；
2：4M；
你可以修改分区大小，及分区数

------
生活就是工作，工作就是生活--对我来说足以！