TM(4)

NAME
tm - TM-11/TE-10 mag tape device interface

SYNOPSIS
controller tm0 at uba? csr 0172520 vector tmintr tape te0 at tm0 drive 0

DESCRIPTION
NOTE: This driver has not been ported from 4.4BSD yet.

The TM-11/TE-10 combination provides a standard tape drive interface as described in mtio(4). Hardware implementing this on the VAX is typified by the Emulex TC-11 controller operating with a Kennedy model 9300 tape transport, providing 800 and 1600 BPI operation at 125 IPS.

DIAGNOSTICS

te%d: no write ring. An attempt was made to write on the tape drive when no write ring was present; this message is written on the terminal of the user who tried to access the tape.

te%d: not online. An attempt was made to access the tape while it was offline; this message is written on the terminal of the user who tried to access the tape.

te%d: can't change density in mid-tape. An attempt was made to write on a tape at a different density than is already recorded on the tape. This message is written on the terminal of the user who tried to switch the density.

te%d: hard error bn%d er=%b. A tape error occurred at block bn; the tm error register is printed in octal with the bits symbolically decoded. Any error is fatal on non-raw tape; when possible the driver will have retried the operation which failed several times before reporting the error.

te%d: lost interrupt. A tape operation did not complete within a reasonable time, most likely because the tape was taken off-line during rewind or lost vacuum. The controller should, but does not, give an interrupt in these cases. The device will be made available again after this message, but any current open reference to the device will return an error as the operation in progress aborts.

SEE ALSO
mt(1), tar(1), ht(4), mt(4), mtio(4), ts(4), ut(4)

HISTORY
A tm driver appeared in AT&T UNIX.

BUGS
May hang if a physical (non-data) error occurs.