1*47674Scael.\" Copyright (c) 1980, 1991 Regents of the University of California. 2*47674Scael.\" All rights reserved. 320680Smckusick.\" 4*47674Scael.\" %sccs.include.redist.man% 520680Smckusick.\" 6*47674Scael.\" @(#)mt.4 6.4 (Berkeley) 03/27/91 7*47674Scael.\" 8*47674Scael.Dd 9*47674Scael.Dt MT 4 vax 10*47674Scael.Os BSD 4 11*47674Scael.Sh NAME 12*47674Scael.Nm mt 13*47674Scael.Nd 14*47674Scael.Tn TM78 Ns / Tn TU-78 15*47674Scael.Tn MASSBUS 16*47674Scaelmagtape interface 17*47674Scael.Sh SYNOPSIS 18*47674Scael.Cd "master mt0 at mba? drive ? tape mu0 at mt0 slave 0" 19*47674Scael.Sh DESCRIPTION 20*47674ScaelThe 21*47674Scael.Tn TM78 Ns / Tn TU-78 22*47674Scaelcombination provides a standard tape drive 2320680Smckusickinterface as described in 24*47674Scael.Xr mtio 4 . 25*47674ScaelOnly 1600 and 6250 26*47674Scael.Tn BPI 27*47674Scaelare supported; the 28*47674Scael.Tn TU-78 29*47674Scaelruns at 125 30*47674Scael.Tn IPS 31*47674Scaeland autoloads tapes. 32*47674Scael.Sh DIAGNOSTICS 33*47674Scael.Bl -diag 34*47674Scael.It mu%d: no write ring. 35*47674ScaelAn 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. 38*47674Scael.Pp 39*47674Scael.It mu%d: not online. 40*47674ScaelAn 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. 43*47674Scael.Pp 44*47674Scael.It "mu%d: can't change density in mid-tape." 45*47674ScaelAn 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. 49*47674Scael.Pp 50*47674Scael.It "mu%d: hard error bn%d mbsr=%b er=%x ds=%b." 51*47674ScaelA tape error occurred 52*47674Scaelat block 53*47674Scael.Em bn ; 54*47674Scaelthe 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. 58*47674Scael.Pp 59*47674Scael.It mu%d: blank tape. 6020681SmckusickAn attempt was made to read a blank tape (a tape without even 6120681Smckusickend-of-file marks). 62*47674Scael.Pp 63*47674Scael.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. 66*47674Scael.El 67*47674Scael.Sh SEE ALSO 68*47674Scael.Xr mt 1 , 69*47674Scael.Xr tar 1 , 70*47674Scael.Xr tp 1 , 71*47674Scael.Xr mtio 4 , 72*47674Scael.Xr tm 4 , 73*47674Scael.Xr ts 4 , 74*47674Scael.Xr ut 4 75*47674Scael.Sh HISTORY 76*47674ScaelThe 77*47674Scael.Nm 78*47674Scaeldriver appeared in 79*47674Scael.Bx 4.1 . 80*47674Scael.Sh BUGS 81*47674ScaelIf a physical error (non-data) occurs, 82*47674Scael.Nm 83*47674Scaelmay hang ungracefully. 84*47674Scael.Pp 85*47674ScaelBecause 800 86*47674Scael.Tn BPI 87*47674Scaeltapes are not supported, the numbering of minor devices 8828261Skarelsis inconsistent with triple-density tape units. 89*47674ScaelUnit 0 is drive 0, 1600 90*47674Scael.Tn BPI. 91