public PartitionDevice (GenericPartition partition, IDiskDevice diskDevice, bool readOnly)
{
this.diskDevice = diskDevice;
this.start = 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;
DeviceManager.Add (this);
}
public void Dump()
{
for (uint index = 0; index < MaxMBRPartitions; index++)
{
GenericPartition partition = partitions[index];
if (partition.PartitionType != PartitionTypes.Empty)
{
TextMode.Write("partition #", (int)index);
TextMode.Write(" found, lba=", (int)partition.StartLBA);
TextMode.Write(", count=", (int)partition.TotalBlocks);
TextMode.Write(", type=", (int)partition.PartitionType);
// for testing
//if (FAT.FileSystem.IsFat (partition.BlockDevice))
// TextMode.Write (" (fat)");
//else
TextMode.Write(" (unknown)");
TextMode.WriteLine();
}
}
}
private bool ReadMasterBootBlock ()
{
valid = false;
if (diskDevice.BlockSize != 512) // only going to work with 512 sector sizes
return false;
BinaryFormat masterboot = new BinaryFormat (diskDevice.ReadBlock (0, 1));
ushort mbrsignature = masterboot.GetUShort (MasterBootRecord.MBRSignature);
diskSignature = masterboot.GetUInt (MasterBootRecord.DiskSignature);
valid = (mbrsignature == MasterBootConstants.MBRSignature);
if (valid) {
for (uint index = 0; index < MaxMBRPartitions; index++) {
uint offset = MasterBootRecord.PrimaryPartitions + (index * 16);
GenericPartition partition = new GenericPartition (index);
partition.Bootable = masterboot.GetByte (offset + PartitionRecord.Status) == 0x80;
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[MasterBootConstants.CodeAreaSize];
for (uint index = 0; index < MasterBootConstants.CodeAreaSize; index++)
code[index] = masterboot.GetByte (index);
return valid;
}
