/// <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;
this.startBlock = partition.StartLBA;
this.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 || diskDevice.TotalBlocks < 3)
{
return(false); // only going to work with 512 sector sizes and disks more than 2 blocks
}
data = diskDevice.ReadBlock(0, 1);
masterboot = new DataBlock(data);
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);
Partitions[index] = new GenericPartition(index)
{
Bootable = masterboot.GetByte(offset + PartitionRecord.Status) == MBRConstant.Bootable,
PartitionType = masterboot.GetByte(offset + PartitionRecord.PartitionType),
StartLBA = masterboot.GetUInt(offset + PartitionRecord.LBA),
TotalBlocks = masterboot.GetUInt(offset + PartitionRecord.Sectors)
};
}
//TODO: Extended Partitions
code = new byte[MBRConstant.CodeAreaSize];
for (uint index = 0; index < MBRConstant.CodeAreaSize; index++)
{
code[index] = masterboot.GetByte(index);
}
return(valid);
}
