HT(4) (vax)

HT(4) | Device Drivers Manual (vax) | HT(4)

# NAME

`ht` —
TM-03/ TE-16, TU-45, TU-77 MASSBUS mag tape device interface:

# SYNOPSIS

`ht0 at mba? drive ?`
`tu0 at ht0 slave 0`

# DESCRIPTION

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

The TM-03 transport combination provides a standard tape drive interface as described in vax/mtio(4). All drives provide both 800 and 1600 BPI; the TE-16 runs at 45 IPS, the TU-45 at 75 IPS, while the TU-77 runs at 125 IPS and autoloads tapes.

# DIAGNOSTICS

tu%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.
tu%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.
tu%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.
tu%d: hard error bn%d mbsr=%b er=%b ds=%b.
  A tape error occurred at block bn; the ht error register and drive status register are 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.

# SEE ALSO

tar(1), vax/mt(1), physio(4), vax/mt(4), vax/mtio(4), vax/tm(4), vax/ts(4), vax/ut(4)

# HISTORY

An `ht` driver appeared in Version 6 AT&T UNIX.

# BUGS

May hang if physical (non-data) errors occur.

February 17, 2017 | NetBSD 9.5