1*47674Scael.\" Copyright (c) 1983, 1991 Regents of the University of California. 2*47674Scael.\" All rights reserved. 320748Smckusick.\" 4*47674Scael.\" %sccs.include.redist.man% 520748Smckusick.\" 6*47674Scael.\" @(#)ut.4 6.2 (Berkeley) 03/27/91 7*47674Scael.\" 8*47674Scael.Dd 9*47674Scael.Dt UT 4 vax 10*47674Scael.Os BSD 4.2 11*47674Scael.Sh NAME 12*47674Scael.Nm ut 13*47674Scael.Nd 14*47674Scael.Tn UNIBUS TU45 15*47674Scaeltri-density tape drive interface 16*47674Scael.Sh SYNOPSIS 17*47674Scael.Cd "controller ut0 at uba0 csr 0172440 vector utintr" 18*47674Scael.Cd "tape tj0 at ut0 drive 0" 19*47674Scael.Sh DESCRIPTION 2020748SmckusickThe 21*47674Scael.Nm ut 2220748Smckusickinterface provides access to a standard tape drive interface as 2320748Smckusickdescribe in 24*47674Scael.Xr mtio 4 . 25*47674ScaelHardware implementing this on the 26*47674Scael.Tn VAX 27*47674Scaelis typified by the System 28*47674ScaelIndustries 29*47674Scael.Tn SI 30*47674Scael9700 tape subsystem. Tapes may be read or written 31*47674Scaelat 800, 1600, and 6250 32*47674Scael.Tn BPI . 33*47674Scael.Sh DIAGNOSTICS 34*47674Scael.Bl -diag 35*47674Scael.It tj%d: no write ring. 3620748SmckusickAn attempt was made to write on the tape drive 3720748Smckusickwhen no write ring was present; this message is written on the terminal of 3820748Smckusickthe user who tried to access the tape. 39*47674Scael.Pp 40*47674Scael.It tj%d: not online. 4120748SmckusickAn attempt was made to access the tape while it 4220748Smckusickwas offline; this message is written on the terminal of the user 4320748Smckusickwho tried to access the tape. 44*47674Scael.Pp 45*47674Scael.It tj%d: can't change density in mid-tape. 4620748SmckusickAn attempt was made to write 4720748Smckusickon a tape at a different density than is already recorded on the tape. 4820748SmckusickThis message is written on the terminal of the user who tried to switch 4920748Smckusickthe density. 50*47674Scael.Pp 51*47674Scael.It "ut%d: soft error bn%d cs1=%b er=%b cs2=%b ds=%b." 5220748SmckusickThe formatter indicated a corrected error at a density other 5320748Smckusickthan 800bpi. The data transferred is assumed to be correct. 54*47674Scael.Pp 55*47674Scael.It "ut%d: hard error bn%d cs1=%b er=%b cs2=%b ds=%b." 5620748SmckusickA tape error occurred 5720748Smckusickat block 58*47674Scael.Pp 59*47674Scael.It bn. 6020748SmckusickAny error is 6120748Smckusickfatal on non-raw tape; when possible the driver will have retried 6220748Smckusickthe operation which failed several times before reporting the error. 63*47674Scael.Pp 64*47674Scael.It tj%d: lost interrupt. 6520748SmckusickA tape operation did not complete 6620748Smckusickwithin a reasonable time, most likely because the tape was taken 6720748Smckusickoff-line during rewind or lost vacuum. The controller should, but does not, 6820748Smckusickgive an interrupt in these cases. The device will be made available 6920748Smckusickagain after this message, but any current open reference to the device 7020748Smckusickwill return an error as the operation in progress aborts. 71*47674Scael.El 72*47674Scael.Sh SEE ALSO 73*47674Scael.Xr mt 1 , 74*47674Scael.Xr mtio 4 75*47674Scael.Sh HISTORY 76*47674ScaelThe 77*47674Scael.Nm 78*47674Scaeldriver appeared in 79*47674Scael.Bx 4.2 . 80*47674Scael.Sh BUGS 81*47674ScaelMay hang if a physical error (non-data) occurs. 82