vc中如何访问硬盘的物理或逻辑扇区？

[wzsok]

有无这样的类或API函数

[jiangtao]

我又一个diskdump的VC例子,你如需要可以e-mail问我要

int ReadAbsoluteSectors( int volume, DWORD start_sector,
WORD num_sectors, void* pBuf ) {
DIOC_REGISTERS reg;
DISKIO di;
BOOL bResult;
DWORD cb;

reg.reg_EAX = volume; // zero-based volume number
reg.reg_EBX = (DWORD)&di;
reg.reg_ECX = 0xffff; // use DISKIO structure
reg.reg_Flags = 1; // preset the carry flag
di.diStartSector = start_sector;
di.diSectors = num_sectors;
di.diBuffer = (DWORD)pBuf;
bResult = DeviceIoControl( hVWin32Device, VWIN32_DIOC_DOS_INT25,
®, sizeof( reg ), ®, sizeof( reg ), &cb, 0 );

if ( !bResult and and (reg.reg_Flags & 1) ) return -1;
return 0;
}

int ReadAbsoluteSectors32( int volume, DWORD start_sector,
WORD num_sectors, void* pBuf ) {
DIOC_REGISTERS reg;
DISKIO di;
BOOL bResult;
DWORD cb;

reg.reg_EAX = 0x7305; // Ext_ABSDiskReadWrite
reg.reg_EBX = (DWORD)&di;
reg.reg_ECX = 0xffff; // use DISKIO structure
reg.reg_EDX = volume; // one-based volume number
reg.reg_ESI = 0; // READ operation
reg.reg_Flags = 0; // preset the carry flag
di.diStartSector = start_sector;
di.diSectors = num_sectors;
di.diBuffer = (DWORD)pBuf;

bResult = DeviceIoControl( hVWin32Device, VWIN32_DIOC_DOS_DRIVEINFO,
®, sizeof( reg ), ®, sizeof( reg ), &cb, 0 );

if ( /*!bResult and and */ (reg.reg_Flags & 1) ) return -1;
return 0;
}

[lu0]

9X:THUNK到WIN16直接用INT13.
NT:WRITEFILE()和READFILE()函数直接支持读写扇区.读写必须在没有文件打开的
情况下进行.通常情况下不可能.通过NATIVE APPLICATION能解决该问题.有关
NATIVE APPLICATION请到我主页一看.
lu0.126.com