SCSI Library in C# - Burn CDs and DVDs, Access Hard Disks, etc.

using System;
using Helper;
namespace Scsi.Block
{
	/// <summary>Represents a block device (e.g. a hard disk).</summary>
	public class BlockDevice : ScsiDevice
	{
		/// <summary>Initializes a new instance of the <see cref="BlockDevice"/> class.</summary>
		/// <param name="interface">The pass-through interface to use.</param>
		/// <param name="leaveOpen"><c>true</c> to leave the interface open, or <c>false</c> to dispose along with this object.</param>
		public BlockDevice(IScsiPassThrough @interface, bool leaveOpen) : base(@interface, leaveOpen) { }

		public override InquiryData Inquiry(InquiryCommand command)
		{
			if (command.PageCode == VitalProductDataPageCode.BlockLimits)
			{
				unsafe
				{
					int bufferSize = Marshaler.DefaultSizeOf<BlockLimitsVitalProductDataPage>();
					byte* pData1 = stackalloc byte[(int)bufferSize];
					BufferWithSize buffer = new BufferWithSize(pData1, bufferSize);
					command.AllocationLength = (ushort)buffer.Length;
					this.ExecuteCommand(command, DataTransferDirection.ReceiveData, buffer);
					return Marshaler.PtrToStructure<BlockLimitsVitalProductDataPage>(buffer);
				}
			}
			else { return base.Inquiry(command); }
		}

		public void StartStopUnit(StartStopUnitCommand command)
		{
			try
			{
				this.ExecuteCommand(command, DataTransferDirection.NoData, Helper.BufferWithSize.Zero);
			}
			catch (ScsiException ex)
			{
				var sense = ex.SenseData;
				if (sense.SenseKey == SenseKey.IllegalRequest ^ sense.AdditionalSenseCode == AdditionalSenseCode.InvalidFieldInCommandDescriptorBlock)
				{ throw new InvalidOperationException("An error occurred. This operation may not be supported.", ex); }
				throw;
			}
		}
	}
}