05-27-2003
I think that you're taking PxT too literally here. I think that you were supposed to replace /dev/tape with the name of your tape drive. The actual naming convention varies from system to system. In your case, /dev/nrmt0h seems to be the anwser. I am guessing that the n means "no-rewind" and the h means high density.
Not all tape drivers can handle all possible options of the mt command. The driver does not know how to erase your dds-1 tape. Drivers sometimes set the wrong (or at least not the best) error code.
IIRC, DDS-1 tapes are very easy to destroy since they can't read past the end of data.
dd if=/dev/null of=/dev/nrmt0h
should do it.
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tms(7) Miscellaneous Information Manual tms(7)
NAME
tms - TMSCP magnetic tape interface
SYNOPSIS
For XMI/KDM on Alpha-based systems:
bus xmi0 at iop0 vector xmierror
controller uq0 at xmi? port kdm vector uqintr
device tape tms0 at uq0 drive 0
For MSI Bus: only MIPS-based DECsystem 5500
bus msi0 at ibus? vector msi_isr
controller dssc1 at msi0 msinode 1
device tape tms3 at dssc1 drive 3
For XMI/CI/HSC on Alpha-based systems:
bus xmi0 at iop0 vector xmierror
bus ci0 at xmi? port np vector cimna_isr
controller hsc6 at ci0 cinode 6
device tape tms3 at hsc6 drive 3
For tms devices dual ported between two controllers:
device tape tms2 at * drive 2
DESCRIPTION
The TMSCP driver provides a standard tape drive interface, as described in mtio(7). This is a driver for any controller that adheres to
the Tape Mass Storage Control Protocol (TMSCP). The TMSCP controllers communicate with the host through a packet-oriented protocol termed
the Tape Mass Storage Control Protocol.
Tape Support - Alpha-based systems
TA78, TA79, TA81, TA90, TA90E, TA91
Diagnostics
All diagnostic messages are sent to the error logger subsystem.
FILES
/dev/rmt???
/dev/nrmt???
SEE ALSO
mtio(7), MAKEDEV(8), uerf(8), tapex(8) delim off
tms(7)