public ODBFSImpl(IBlockStore blockStore)
{
if (blockStore == null)
{
throw new ArgumentNullException("blockStore");
}
_blockStore = blockStore;
var xBuff = new byte[blockStore.BlockSize];
blockStore.Retrieve(0, new ArraySegment<byte>(xBuff));
if (ByteConverter.ReadUInt32(xBuff, 0) != ODBFSMagic)
{
throw new Exception("Blockstore doesn't contain an ODBFS system!");
}
_virtualBlockSize = ByteConverter.ReadUInt32(xBuff, 4);
if (_virtualBlockSize % blockStore.BlockSize != 0)
{
throw new Exception("Corrupt data!");
}
_rawBlocksPerVirtualBlock = _virtualBlockSize / blockStore.BlockSize;
_metaGroupItemsPerVirtualBlock = (_virtualBlockSize - 32) / 32;
LoadConfiguration();
}