1 BLDVRP 2+ 2? 2 B512 ( number of buffers ) 2 B1K ( number of buffers ) 2 B2K ( number of buffers ) 2 B4K ( number of buffers ) 2 B8K ( number of buffers ) 2 B12K ( number of buffers ) 2 B16K ( number of buffers ) 2 B20K ( number of buffers ) 2 B24K ( number of buffers ) 2 B28K ( number of buffers ) 2 B32K ( number of buffers )