} /* OpenSipperDrive */
private void GetListOfSipperFiles()
{
totalSectorsUsed = Constants.MAX_SIPPER_FILES + 1; // 1 Sector for each posible file + 1 sector for the SipperPartitionSector
sipperFiles = new SipperFileControlBlockList();
Int64 sipperDirectorySectorByteOffset = mbr.GetSipperDirectoryByteOffset();
fs.Seek(sipperDirectorySectorByteOffset, SeekOrigin.Begin);
for (int i = 0; i < Constants.MAX_SIPPER_FILES; i++)
{
SipperFileControlBlock fcb = SipperFileControlBlock.CreateFromFileStream(fs);
if (fcb == null)
{
throw new Exception("Error reading Sipper FileControlBlock");
}
fcb.FcbIndex = i;
if (fcb.EndSector <= 0)
{
if (fcb.Allocated != SipperFileControlBlock.SIPPER_FILE_FREE)
{
sipperFiles.Add(fcb);
lastSectorUsed = Math.Max(fcb.EndSector, lastSectorUsed);
totalSectorsUsed += 1 + fcb.EndSector - fcb.StartSector;
}
}
else if (fcb.EndSector > 0)
{
sipperFiles.Add(fcb);
lastSectorUsed = Math.Max(fcb.EndSector, lastSectorUsed);
totalSectorsUsed += 1 + fcb.EndSector - fcb.StartSector;
}
}
return;
} /* GetListOfSipperFiles */
} /* ResetSipperDirectory */
//***********************************************************************************
//* Determines if the same disk drive is attached. *
//***********************************************************************************
public bool AreWeTheSameDrive()
{
if ((sipperPartitionSector == null) || (origFirstFileControlBlock == null))
{
return(false);
}
// For now we will always return true;
return(true);
BlockStart();
long lastFsPosition = 0;
bool diskFileWasAlreadyOpened = false;
if (fs != null)
{
diskFileWasAlreadyOpened = true;
lastFsPosition = fs.Position;
}
if ((!diskFileWasAlreadyOpened) && (openedSipperFiles != null) && (openedSipperFiles.Count == 0))
{
// We will only reopen the Disk handle if no SIPPER files are open.
try
{
ReOpen(false);
}
catch (Exception)
{
BlockEnd();
return(false);
}
}
bool weAreTheSameHardDrive = false;
Int64 sipperPartitionSectorOffset = mbr.GetPartitionSectorByteOffset(Constants.SIPPER_PARTITION);
fs.Seek(sipperPartitionSectorOffset, SeekOrigin.Begin);
SipperPartitionSector currentSipperPartitionSector = SipperPartitionSector.CreateFromFileStream(fs);
if (sipperPartitionSector.Equals(currentSipperPartitionSector))
{
SipperFileControlBlock firstFileControlBlock = SipperFileControlBlock.CreateFromFileStream(fs);
if (firstFileControlBlock.Equals(origFirstFileControlBlock))
{
weAreTheSameHardDrive = true;
}
}
if (diskFileWasAlreadyOpened)
{
fs.Seek(lastFsPosition, SeekOrigin.Begin);
}
else
{
CloseHandleToPhysicalDisk();
}
BlockEnd();
return(weAreTheSameHardDrive);
}