KBACKUP has been reported to work with tape drives on a QIC-02 controller, many different SCSI streamers and DAT drives as well as with the ftape driver version 2.03 (drives controlled by the floppy controller). It has reported not to work with zftape yet. It has also been reported to work with the IOmega ZIPdrive, both the SCSI version as well as the alpha driver for the parallel-port version.
I am using and testing KBACKUP with a (rather old) Tandberg drive on a no-name QIC-02 controller. The QIC-02 LINUX driver implements the ``/dev/tape-reset '' device, so KBACKUP can use it to reset the driver at your request. I have not heard of any other driver supplying this pseudo-device.
For more details on using floppy streamers (the ftape and zftape drivers), see the Ftape-HOWTO.