MULTIBUFallocates several buffers of shared memory for double buffering. The size of each buffer is the product of the blocksize and the number of blocks given in the Multibuf Options-Menu. An example: If you set the blocksize to 10240 and the number of blocks to 100, MULTIBUFwill have a buffersize of [IMAGE ]bytes. If you choose 10 buffers in this menu, you will have approximately 10 Mbytes of buffers which should be a good setting for slow tape drives on mashines with enough physical memory. When not using compression, you might not need any double buffering.