Stefan Hensen wrote:

> The harddisks and the CD-ROM work without problems. But when I try to write
> or read data to/from a tape with commands like 'tar', 'dump' or 'dd', I
> always get error messages like
>   tar: can't write to /dev/rst0 : Input/output error
> or
>   tar: read error on /dev/rst0 : Input/output error,
> respectively, and at the same time the following kernel error message
> appears on the console and in the messages logfile:
>   st0: bad request, must be between 33925 and 16777215

Hm... looks like the tape can only use variable block sizes in certain ranges.

You should switch it to a convenient fixed blocksize once (which is what
tar, dump, etc. use anyway) which is a multiple of 512 bytes.

man mt

will tell you how to.

Regards,
	i.s.