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POOpening a file handle with a specific block size
 

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    <p>I am trying to write some data to a tape drive - I am using a class found here: <a href="http://www.codeproject.com/Articles/15487/Magnetic-Tape-Data-Storage-Part-1-Tape-Drive-IO-Co" rel="nofollow">http://www.codeproject.com/Articles/15487/Magnetic-Tape-Data-Storage-Part-1-Tape-Drive-IO-Co</a></p> <p>I can load the tape drive using the "Load" method fine, although when I attempt to write to the tape I get the following error:</p> <blockquote> <p>IO operation will not work. Most likely the file will become too long or the handle was not opened to support synchronous IO operations.</p> </blockquote> <p>I believe this problem is due to the file handle using an incorrect block size. I know the block size for the device is: 32768 - although how can I open a file handle using this block size?</p> <pre><code>TapeOperator TapeOperatorObject = new TapeOperator(); // Load tape 1 TapeOperatorObject.Load(@"\\.\Tape1"); // Write to tape drive Console.WriteLine("Writing"); FileStream inputFile = new FileStream("test.txt", FileMode.Open); TapeOperatorObject.Write(0, ReadFully(inputFile)); public static byte[] ReadFully(Stream input) { byte[] buffer = new byte[16 * 1024]; using (MemoryStream ms = new MemoryStream()) { int read; while ((read = input.Read(buffer, 0, buffer.Length)) &gt; 0) { ms.Write(buffer, 0, read); } return ms.ToArray(); } } </code></pre> <p>The Write method in the class I am using is below:</p> <pre><code> /// &lt;summary&gt; /// Writes to the tape given stream starting from given postion /// &lt;/summary&gt; /// &lt;param name="startPos"&gt;&lt;/param&gt; /// &lt;param name="stream"&gt;&lt;/param&gt; public void Write( long startPos, byte[] stream ) { // Get number of blocks that will be nned to perform write uint numberOfBlocks = GetBlocksNumber( stream.Length ); // Updates tape's current position SetTapePosition( startPos ); byte[] arrayToWrite = new byte[ numberOfBlocks * BlockSize ]; Array.Copy( stream, arrayToWrite, stream.Length ); // Write data to the device m_stream.Write( stream, 0, stream.Length ); m_stream.Flush(); } </code></pre> <p>Thanks</p> <ul> <li>David</li> </ul>
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