prlw1@newn.cam.ac.uk (Patrick Welche) writes:

>I have just inherited an HP T4000s tape drive (which appears in the quirk
>table => must be know about), but trying various tapes, I either get

>st0(ahc0:4:0):  Check Condition on CDB: 0x1b 00 00 00 01 00
>    SENSE KEY:  Media Error
>     ASC/ASCQ:  Positioning Error Detected By Read of Medium

>or

>st0(ahc0:4:0):  Check Condition on CDB: 0x00 00 00 00 00 00
>    SENSE KEY:  Media Error
>     ASC/ASCQ:  Incompatible Medium Installed

>This happens no matter what I try eg mt status, tar t,
>dd if=/dev/null of=/dev/nrst0, mt erase etc. Any thoughts on what
>else I could try? (NetBSD-1.4/i386)

Those are media errors.  Make sure that the tapes are OK and that
the heads aren't dirty/worn down.

-- 
Christoph Badura					www.netbsd.org

	Anything that can be done in O(N) can be done in O(N^2).
	-- Ralf Schuettau (after looking at a particular piece of code)