/// <summary>
/// Initializes a new instance of the <see cref="PartitionDevice"/> class.
/// </summary>
/// <param name="diskDevice">The disk device.</param>
/// <param name="partition">The partition.</param>
/// <param name="readOnly">if set to <c>true</c> [read only].</param>
public PartitionDevice(IDiskDevice diskDevice, GenericPartition partition, bool readOnly)
{
this.diskDevice = diskDevice;
startBlock = partition.StartLBA;
blockCount = partition.TotalBlocks;
this.readOnly = readOnly;
base.Parent = diskDevice as Device;
base.Name = base.Parent.Name + "/Partition" + (partition.Index + 1).ToString(); // need to give it a unique name
base.DeviceStatus = DeviceStatus.Online;
}
/// <summary>
/// Reads the master boot block.
/// </summary>
/// <returns></returns>
public bool Read()
{
valid = false;
if (diskDevice.BlockSize != 512) return false; // only going to work with 512 sector sizes
if (diskDevice.TotalBlocks < 3) return false;
BinaryFormat masterboot = new BinaryFormat(diskDevice.ReadBlock(0, 1));
if (masterboot.GetUShort(MBR.MBRSignature) != MBRConstant.MBRSignature)
return false;
valid = true;
diskSignature = masterboot.GetUInt(MBR.DiskSignature);
for (uint index = 0; index < MaxMBRPartitions; index++) {
uint offset = MBR.FirstPartition + (index * MBRConstant.PartitionSize);
GenericPartition partition = new GenericPartition(index);
partition.Bootable = masterboot.GetByte(offset + PartitionRecord.Status) == MBRConstant.Bootable;
partition.PartitionType = masterboot.GetByte(offset + PartitionRecord.PartitionType);
partition.StartLBA = masterboot.GetUInt(offset + PartitionRecord.LBA);
partition.TotalBlocks = masterboot.GetUInt(offset + PartitionRecord.Sectors);
Partitions[index] = partition;
}
//TODO: Extended Partitions
code = new byte[MBRConstant.CodeAreaSize];
for (uint index = 0; index < MBRConstant.CodeAreaSize; index++)
code[index] = masterboot.GetByte(index);
return valid;
}
/// <summary>
/// Initializes a new instance of the <see cref="MasterBootBlock"/> class.
/// </summary>
/// <param name="diskDevice">The disk device.</param>
public MasterBootBlock(IDiskDevice diskDevice)
{
this.diskDevice = diskDevice;
Partitions = new GenericPartition[MaxMBRPartitions];
for (uint i = 0; i < MaxMBRPartitions; i++)
Partitions[i] = new GenericPartition(i);
Read();
}