1*61599Sbostic.\" Copyright (c) 1980, 1991, 1993 2*61599Sbostic.\" The Regents of the University of California. All rights reserved. 320680Smckusick.\" 447674Scael.\" %sccs.include.redist.man% 520680Smckusick.\" 6*61599Sbostic.\" @(#)mt.4 8.1 (Berkeley) 06/05/93 747674Scael.\" 847674Scael.Dd 947674Scael.Dt MT 4 vax 1047674Scael.Os BSD 4 1147674Scael.Sh NAME 1247674Scael.Nm mt 1347674Scael.Nd 1447674Scael.Tn TM78 Ns / Tn TU-78 1547674Scael.Tn MASSBUS 1647674Scaelmagtape interface 1747674Scael.Sh SYNOPSIS 1847674Scael.Cd "master mt0 at mba? drive ? tape mu0 at mt0 slave 0" 1947674Scael.Sh DESCRIPTION 2047674ScaelThe 2147674Scael.Tn TM78 Ns / Tn TU-78 2247674Scaelcombination provides a standard tape drive 2320680Smckusickinterface as described in 2447674Scael.Xr mtio 4 . 2547674ScaelOnly 1600 and 6250 2647674Scael.Tn BPI 2747674Scaelare supported; the 2847674Scael.Tn TU-78 2947674Scaelruns at 125 3047674Scael.Tn IPS 3147674Scaeland autoloads tapes. 3247674Scael.Sh DIAGNOSTICS 3347674Scael.Bl -diag 3447674Scael.It mu%d: no write ring. 3547674ScaelAn attempt was made to write on the tape drive 3620680Smckusickwhen no write ring was present; this message is written on the terminal of 3720680Smckusickthe user who tried to access the tape. 3847674Scael.Pp 3947674Scael.It mu%d: not online. 4047674ScaelAn attempt was made to access the tape while it 4120680Smckusickwas offline; this message is written on the terminal of the user 4220680Smckusickwho tried to access the tape. 4347674Scael.Pp 4447674Scael.It "mu%d: can't change density in mid-tape." 4547674ScaelAn attempt was made to write 4620680Smckusickon a tape at a different density than is already recorded on the tape. 4720680SmckusickThis message is written on the terminal of the user who tried to switch 4820680Smckusickthe density. 4947674Scael.Pp 5047674Scael.It "mu%d: hard error bn%d mbsr=%b er=%x ds=%b." 5147674ScaelA tape error occurred 5247674Scaelat block 5347674Scael.Em bn ; 5447674Scaelthe mt error register and drive status register are 5520681Smckusickprinted in octal with the bits symbolically decoded. Any error is 5620680Smckusickfatal on non-raw tape; when possible the driver will have retried 5720680Smckusickthe operation which failed several times before reporting the error. 5847674Scael.Pp 5947674Scael.It mu%d: blank tape. 6020681SmckusickAn attempt was made to read a blank tape (a tape without even 6120681Smckusickend-of-file marks). 6247674Scael.Pp 6347674Scael.It mu%d: offline. 6420681SmckusickDuring an i/o operation the device was set offline. If a 6520681Smckusicknon-raw tape was used in the access it is closed. 6647674Scael.El 6747674Scael.Sh SEE ALSO 6847674Scael.Xr mt 1 , 6947674Scael.Xr tar 1 , 7047674Scael.Xr tp 1 , 7147674Scael.Xr mtio 4 , 7247674Scael.Xr tm 4 , 7347674Scael.Xr ts 4 , 7447674Scael.Xr ut 4 7547674Scael.Sh HISTORY 7647674ScaelThe 7747674Scael.Nm 7847674Scaeldriver appeared in 7947674Scael.Bx 4.1 . 8047674Scael.Sh BUGS 8147674ScaelIf a physical error (non-data) occurs, 8247674Scael.Nm 8347674Scaelmay hang ungracefully. 8447674Scael.Pp 8547674ScaelBecause 800 8647674Scael.Tn BPI 8747674Scaeltapes are not supported, the numbering of minor devices 8828261Skarelsis inconsistent with triple-density tape units. 8947674ScaelUnit 0 is drive 0, 1600 9047674Scael.Tn BPI. 91