ht(4) [bsd man page]
HT(4) Kernel Interfaces Manual HT(4) NAME
ht - TM-03/TE-16,TU-45,TU-77 MASSBUS magtape interface SYNOPSIS
/sys/conf/SYSTEM: NHT ht_drives # TE16, TU45, TU77 /etc/dtab: #Name Unit# Addr Vector Br Handler(s) # Comments ht ? 172440 224 5 htintr # tu 16 massbus tape major device number(s): raw: 6 block: 0 minor device encoding: bits 0003 specify HT drive bit 0004 specifies no-rewind operation bit 0010 specifies 1600BPI recording density instead of 800BPI DESCRIPTION
The tm-03/transport combination provides a standard tape drive interface as described in 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. FILES
/dev/MAKEDEV script to create special files /dev/MAKEDEV.local script to localize special files SEE ALSO
mt(1), tar(1), tp(1), mtio(4), tm(4), ts(4), dtab(5), autoconfig(8) 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 termi- nal 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 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. BUGS
If any non-data error is encountered on non-raw tape, it refuses to do anything more until closed. The system should remember which controlling terminal has the tape drive open and write error messages to that terminal rather than on the console. 3rd Berkeley Distribution January 28, 1988 HT(4)
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TMSCP(4) Kernel Interfaces Manual TMSCP(4) NAME
tmscp - DEC TMSCP magtape interface SYNOPSIS
/sys/conf/SYSTEM: NTMSCP 1 # TMSCP controllers NTMS 1 # TMSCP drives TMSCP_DEBUG NO # debugging code in in TMSCP drive (EXPENSIVE) /etc/dtab: #Name Unit# Addr Vector Br Handler(s) # Comments tms ? 174500 260 5 tmsintr # tmscp driver tms ? 164334 0 5 tmsintr # alternate major device number(s): raw: 23 block: 12 minor device encoding: bit: |7 | 6 | 5 | 4 | 3 | 2 | 1 | 0| ------------------------------- C C X D D N U U C = Controller # (max of 4 controllers) D = Density N = Norewind on close U = Unit (drive) number (max of 4 drives per controller) DESCRIPTION
Tape controllers compatible with the DEC Tape Mass Storage Control Protocol (TMSCP) architecture such as the TU81 and the TK50 provide a standard tape drive interface as described in mtio(4). The controller communicates with the host through a packet oriented protocol. Con- sult the file <pdp/tmscp.h> for a detailed description of this protocol. FILES
/dev/MAKEDEV script to create special files /dev/MAKEDEV.local script to localize special files The vector specified in /etc/dtab may be given as an explicit value in which case autoconfig(8) will attempt to allocate the specified vec- tor. The vector may also be (if the system is at revision level 100 or higher) given as 0 - in which case autoconfig(8) will request the kernel to allocate the next available vector (beginning at 01000 and proceeding downward) which autoconfig(8) will initialize. Multiple drives on a single controller are supported. Multiple controllers are also supported. Density selection is specified by bits 3 and 4 in the minor device number. A value of 0 requests the lowest density of a drive and a value of 3 the highest density. Values of 1 and 2 are essentially equivalent (because because TMSCP only defines values for three densities) and request the middle density (for tri-density tape drives). DIAGNOSTICS
tms: !drives. Not enough drives were declared when the kernel was built. The NTMS parameter in the kernel config file needs to be increased by at least one. tms%d stepN init failed: sa %x. Step N of the 4 step initialization sequence has failed. tms%d: random intr. An unexpected interrupt was received. This is indicative of some other device using the same interrupt vector as the TMSCP controller. The interrupt is ignored. tms%d Ver %d Mod %d. The version and model number of the controller are displayed when the controller is initialized. This is an informa- tion message and not an error. tms%d: state %d. The controller state is not one of the 4 initialization states or the RUN state. This indicates a serious problem in the driver and possibly the hardware. tms%d: fatal error %x. The controller detected a ``fatal error'' in the status returned to the host. The contents of the status register are displayed. tms%d init fail. The controller failed to initialize. Indicative of a hardware problem. tms%d,%d flush fail. The cache failed to flush during a close operation. Data loss is possible in this case. tms%d,%d: sa %x state %d. A fatal error. The controller will be reset in an attempt to resume operation. tms ioctl. An invalid internal ioctl function call has been made. This is a driver bug. tms%d,%d inv end. An invalid end (completion) code has been detected. A drive has returned 0 as the opcode originally issued. This is a hardware problem. tms%d,%d bad rsp: %x. An unrecognized response has been received. This is a driver bug. tms%d,%d cache lost The cache on the drive has been lost. Data loss is likely. Usually due to a hardware problem. The following error is produced when a TMSCP error log datagram is received: tms%d,%d dgram fmt=%x evt=%x grp=%x flg=%x pos=%D. Earlier versions of the driver consumed a noticeable amount of kernel D-space decoding and pretty printing more detailed information. This has been removed in favor of a shorter message. In the future an error log daemon will be written and the datagrams from the MSCP and TMSCP drivers passed to it for analysis. SEE ALSO
mt(1), tar(1), tp(1), mtio(4), tm(4), ts(4), ut(4), dmesg(8), dtab(5), autoconfig(8) BUGS
If any non-data error is encountered on non-raw tape, it refuses to do anything more until closed. On quad-density tape drives (the Kennedy 9662 for example) the middle density of 3200bpi is not host selectable (it can be manually selected from the drive's front panel) because TMSCP only defines 800, 1600 and 6250bpi. 3rd Berkeley Distribution December 22, 1995 TMSCP(4)