|
[x]
Posted via EE Mobile
|
||
Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again. |
||
| Question |
|
[x]
Attachment Details
|
||
|
[x]
The Solution Rating System
|
||
With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.
Your Input Matters If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support. Thank you! |
||
1: 2: 3: 4: 5: 6: 7: 8: 9: 10: 11: 12: 13: 14: 15: 16: 17: 18: 19: 20: 21: 22: 23: 24: 25: 26: 27: 28: 29: 30: 31: 32: 33: 34: 35: 36: 37: 38: 39: 40: 41: 42: 43: 44: 45: 46: 47: 48: 49: 50: 51: 52: 53: 54: 55: 56: 57: 58: 59: 60: 61: 62: 63: 64: 65: 66: 67: 68: 69: 70: 71: 72: 73: 74: 75: 76: 77: 78: 79: 80: 81: 82: 83: 84: 85: 86: 87: 88: 89: 90: 91: 92: 93: 94: 95: 96: 97: 98: 99: 100: 101: 102: 103: 104: 105: 106: 107: 108: 109: 110: 111: 112: 113: 114: 115: 116: 117: 118: 119: 120: 121: 122: 123: 124: 125: 126: 127: 128: 129: 130: 131: 132: 133: 134: 135: 136: 137: 138: 139: 140: 141: 142: |
// these struct definitions are in the class IOWrap
[StructLayout(LayoutKind.Sequential)]
public struct STORAGE_PROPERTY_QUERY
{
public STORAGE_PROPERTY_ID PropertyId; // ID of the property being retrieved
public STORAGE_QUERY_TYPE QueryType; // Flags indicating the type of query being performed
public byte[] AdditionalParameters; // Space for additional parameters if necessary
}
[StructLayout(LayoutKind.Sequential)]
public struct STORAGE_DEVICE_DESCRIPTOR
{
ulong Version;
ulong Size;
byte DeviceType;
byte DeviceTypeModifier;
bool RemovableMedia;
bool CommandQueueing;
ulong ProductIdOffset;
ulong ProductRevisionOffset
ulong SerialNumberOffset;
STORAGE_BUS_TYPE BusType; device.
ulong RawPropertiesLength;
byte RawDeviceProperties;
}
[StructLayout(LayoutKind.Sequential)]
public struct STORAGE_ADAPTER_DESCRIPTOR
{
public uint Version;
public uint Size;
public uint MaximumTransferLength;
public uint MaximumPhysicalPages;
public uint AlignmentMask;
public bool AdapterUsesPio;
public bool AdapterScansDown;
public bool CommandQueueing;
public bool AcceleratedTransfer;
public byte BusType;
public ushort BusMajorVersion;
public ushort BusMinorVersion;
}
[StructLayout(LayoutKind.Sequential)]
public struct DRIVE_LAYOUT_INFORMATION
{
public uint PartitionCount;
public uint Signature;
public PARTITION_INFORMATION PartitionEntry;
}
[DllImport("Kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
public extern static bool DeviceIoControl(IntPtr hDevice,
uint IoControlCode,
IntPtr lpInBuffer,
int InBufferSize,
IntPtr lpOutBuffer,
int OutBufferSize,
ref int lpBytesReturned,
IntPtr lpOverlapped);
STORAGE_PROPERTY_QUERY query = new STORAGE_PROPERTY_QUERY();
query.PropertyId = STORAGE_PROPERTY_ID.StorageDeviceProperty;
query.QueryType = STORAGE_QUERY_TYPE.PropertyStandardQuery;
query.AdditionalParameters = new byte[1];
int returnedLength = 0;
int nPtrQryBytes = Marshal.SizeOf(query);
IntPtr ptrQry = Marshal.AllocHGlobal(nPtrQryBytes);
STORAGE_DEVICE_DESCRIPTOR device = new STORAGE_DEVICE_DESCRIPTOR();
int nDevicePtrBytes = Marshal.SizeOf(device);
IntPtr ptrDevice = Marshal.AllocHGlobal(nDevicePtrBytes);
bool status = IOWrap.DeviceIoControl(hDevice, IOWrap.IOCTL_STORAGE_QUERY_PROPERTY,
ptrQry, nPtrQryBytes,
ptrDevice, 512, //nDevicePtrBytes,
ref returnedLength,
IntPtr.Zero);
string errMsg = new Win32Exception(Marshal.GetLastWin32Error()).Message;
// this errMsg says "The operation completed successfully" HOWEVER, the value for returnedLength is 0 and the ptrDevice buffer has not been populated
STORAGE_PROPERTY_QUERY query = new STORAGE_PROPERTY_QUERY();
query.PropertyId = STORAGE_PROPERTY_ID.StorageAdapterProperty;
query.QueryType = STORAGE_QUERY_TYPE.PropertyStandardQuery;
query.AdditionalParameters = new byte[1];
// create ptr to query for DeviceIoControl
int nPtrQryBytes = Marshal.SizeOf(query);
IntPtr ptrQuery = Marshal.AllocHGlobal(nPtrQryBytes);
STORAGE_ADAPTER_DESCRIPTOR adpDesc = new STORAGE_ADAPTER_DESCRIPTOR();
int nAdpDescBytes = Marshal.SizeOf(adpDesc);
IntPtr ptrAdpDesc = Marshal.AllocHGlobal(nAdpDescBytes);
status = IOWrap.DeviceIoControl(hDevice,
IOWrap.IOCTL_STORAGE_QUERY_PROPERTY, ptrQuery,
nPtrQryBytes,
ptrAdpDesc, 512,
ref returnedLen, I
ntPtr.Zero);
string errMsg = new Win32Exception(Marshal.GetLastWin32Error()).Message;
// note this call returns the following error - "An attempt was made to reference a token that does not exist"
// This following call works successfully every time
IOWrap.DISK_GEOMETRY diskGeometry = new IOWrap.DISK_GEOMETRY();
int nBytes = Marshal.SizeOf(diskGeometry);
IntPtr pDiskGeometry = Marshal.AllocHGlobal(nBytes);
status = IOWrap.DeviceIoControl(hDevice, (uint)IOWrap.EIOControlCode.DiskGetDriveGeometry,
IntPtr.Zero, 0,
pDiskGeometry, nBytes,
ref returnedLength, IntPtr.Zero);
IOWrap.DRIVE_LAYOUT_INFORMATION layoutInfo = new IOWrap.DRIVE_LAYOUT_INFORMATION();
nBytes = Marshal.SizeOf(layoutInfo);
IntPtr pLayoutInfo = Marshal.AllocHGlobal(nBytes);
returnedLength = 0;
status = IOWrap.DeviceIoControl(hDevice, (uint)IOWrap.EIOControlCode.DiskGetDriveLayout,
IntPtr.Zero, 0,
pLayoutInfo, 512,
ref returnedLength,
IntPtr.Zero);
// the following call sometimes works and sometimes throws an OutOfMemory Exception
IOWrap.DRIVE_LAYOUT_INFORMATION layoutInfo = new IOWrap.DRIVE_LAYOUT_INFORMATION();
nBytes = Marshal.SizeOf(layoutInfo);
IntPtr pLayoutInfo = Marshal.AllocHGlobal(nBytes);
returnedLength = 0;
status = IOWrap.DeviceIoControl(hDevice, (uint)IOWrap.EIOControlCode.DiskGetDriveLayout,
IntPtr.Zero, 0,
pLayoutInfo, 512,
ref returnedLength,
IntPtr.Zero);
|
Advertisement
| Hall of Fame |