/// <returns>In bytes</returns>
public static long GetMaxNewExtentLength(DynamicDisk disk, long alignInSectors)
{
List <DiskExtent> unallocatedExtents = GetUnallocatedSpace(disk);
if (unallocatedExtents == null)
{
return(-1);
}
long result = 0;
for (int index = 0; index < unallocatedExtents.Count; index++)
{
DiskExtent extent = unallocatedExtents[index];
if (alignInSectors > 1)
{
extent = DiskExtentHelper.GetAlignedDiskExtent(extent, alignInSectors);
}
if (extent.Size > result)
{
result = extent.Size;
}
}
return(result);
}
/// <param name="allocationLength">In bytes</param>
/// <param name="alignInSectors">0 or 1 for no alignment</param>
/// <returns>Allocated DiskExtent or null if there is not enough free disk space</returns>
public static DiskExtent AllocateNewExtent(DynamicDisk disk, long allocationLength, long alignInSectors)
{
List <DiskExtent> unallocatedExtents = GetUnallocatedSpace(disk);
if (unallocatedExtents == null)
{
return(null);
}
for (int index = 0; index < unallocatedExtents.Count; index++)
{
DiskExtent extent = unallocatedExtents[index];
if (alignInSectors > 1)
{
extent = DiskExtentHelper.GetAlignedDiskExtent(extent, alignInSectors);
}
if (extent.Size >= allocationLength)
{
return(new DiskExtent(extent.Disk, extent.FirstSector, allocationLength));
}
}
return(null);
}