public static byte[] GetBytes(string devicePath)
{
MasterBootRecord mbr = MasterBootRecord.Get(devicePath);
if (mbr.PartitionTable[0].SystemID == "EFI_GPT_DISK")
{
IntPtr hDevice = NativeMethods.getHandle(devicePath);
using (FileStream streamToRead = NativeMethods.getFileStream(hDevice))
{
return(NativeMethods.readDrive(streamToRead, GPT_OFFSET, SECTOR_SIZE));
}
}
else
{
throw new Exception("No GPT found. Please use Get-MBR cmdlet");
}
}
/// <summary>
///
/// </summary>
/// <param name="devicePath"></param>
/// <returns></returns>
public static byte[] GetBytes(string devicePath)
{
MasterBootRecord mbr = MasterBootRecord.Get(devicePath);
List <byte> byteList = new List <byte>();
if (mbr.PartitionTable[0].SystemId == "EFI_GPT_DISK")
{
using (FileStream streamToRead = Helper.getFileStream(devicePath))
{
byte[] headerBytes = Helper.readDrive(streamToRead, GPT_OFFSET, SECTOR_SIZE);
long partitionTableOffset = BitConverter.ToInt64(headerBytes, 0x48);
uint partitionCount = BitConverter.ToUInt32(headerBytes, 0x50);
uint partitionSize = BitConverter.ToUInt32(headerBytes, 0x54);
long partitionBufferSize = partitionCount * partitionSize;
if (!((partitionBufferSize % 512) == 0))
{
partitionBufferSize = partitionBufferSize + (SECTOR_SIZE - (partitionBufferSize % SECTOR_SIZE));
}
byte[] partitionBytes = Helper.readDrive(streamToRead, partitionTableOffset * SECTOR_SIZE, partitionBufferSize);
byteList.AddRange(headerBytes);
byteList.AddRange(partitionBytes);
}
return(byteList.ToArray());
}
else
{
throw new Exception("No GPT found. Please use Get-MBR cmdlet");
}
}
public static MasterBootRecord Get(string drivePath)
{
// Read Master Boot Record (first 512 bytes) from disk
return(new MasterBootRecord(MasterBootRecord.GetBytes(drivePath)));
}
internal GuidPartitionTable(string devicePath)
{
MasterBootRecord mbr = MasterBootRecord.Get(devicePath);
if (mbr.PartitionTable[0].SystemId == "EFI_GPT_DISK")
{
using (FileStream streamToRead = Helper.getFileStream(devicePath))
{
// Get Header
GuidPartitionTableHeader GPTHeader = new GuidPartitionTableHeader(Helper.readDrive(streamToRead, GPT_OFFSET, SECTOR_SIZE));
Revision = GPTHeader.Revision;
HeaderSize = GPTHeader.HeaderSize;
MyLBA = GPTHeader.MyLBA;
AlternateLBA = GPTHeader.AlternateLBA;
FirstUsableLBA = GPTHeader.FirstUsableLBA;
LastUsableLBA = GPTHeader.LastUsableLBA;
DiskGuid = GPTHeader.DiskGUID;
PartitionEntryLBA = GPTHeader.PartitionEntryLBA;
NumberOfPartitionEntries = GPTHeader.NumberOfPartitionEntries;
SizeOfPartitionEntry = GPTHeader.SizeOfPartitionEntry;
// Get PartitionTable
List <GuidPartitionTableEntry> partitionList = new List <GuidPartitionTableEntry>();
bool Continue = true;
// Iterate through sectors that contain the GPT Entry Array
for (ulong j = GPTHeader.PartitionEntryLBA; (j < GPTHeader.PartitionEntryLBA + (GPTHeader.NumberOfPartitionEntries / (SECTOR_SIZE / GPTHeader.SizeOfPartitionEntry))); j++)
{
// Read one sector
byte[] partitionSectorBytes = Helper.readDrive(streamToRead, (SECTOR_SIZE * (long)j), SECTOR_SIZE);
// Iterate through Partition Entries in Sector
// Sectors (512 bytes) / Partitions (128 bytes) = 4 partitions per sector
for (int i = 0; i < 512; i += (int)GPTHeader.SizeOfPartitionEntry)
{
// Instantiate a GuidPartitionTableEntry object
GuidPartitionTableEntry entry = new GuidPartitionTableEntry(Helper.GetSubArray(partitionSectorBytes, i, (int)GPTHeader.SizeOfPartitionEntry));
// If entry's PartitionTypeGUID is 00000000-0000-0000-0000-000000000000 then it is not a partition
if (entry.PartitionTypeGuid == new Guid("00000000-0000-0000-0000-000000000000"))
{
Continue = false;
break;
}
partitionList.Add(entry);
}
if (!Continue)
{
break;
}
}
PartitionTable = partitionList.ToArray();
}
}
else
{
throw new Exception("No GPT found. Please use Get-MBR cmdlet");
}
}
