> 
> When I try to backup:
> 
> # find . -print | cpio -ocv > /dev/st0
> 
> I am getting a few line:
> 
> .
> ./local
> ./local/bin
> ./local/lib
> ./local/libdata
> ./local/libexec
> ahc1: target 2 synchronous at 10.0MHz, offset = 0xf

use raw (/dev/rst) or raw non-rewinding (/dev/nrst0) instead of block
device. IMHO there is no sense of keeping block tape device support in
kernel.