sj(7)                          DG/UX R4.11MU05                         sj(7)


NAME
       sj - SCSI Jukebox

SYNOPSIS
       sj(parent-bus[,id[,lun]])

DESCRIPTION
       The sj device driver accesses a Small Computer Systems Interface
       (SCSI) jukebox (medium changer) device.  The currently supported
       models are:

            Model Number   Description

            61008          SCSI-2 8mm Tape Library


       The sj device driver controls the medium transport aspects of the
       jukebox device, moving media (tapes cartridges, disk platters, etc.)
       between slots and drives.  The data transfer devices (tape or disk
       drives) are accessed via the appropriate device driver (st or sd,
       respectively).

       To configure an sj device, you must add a device name entry of the
       form described above to the DG/UX system configuration file.  The
       parameters in a device name have the following meanings:

       ·   The parent-bus parameter is itself a device name, representing
           the SCSI bus device to which the device is attached (ncsc(0) or
           dgsc(vme(1),B,6), for example).  There is no default value for
           this parameter; it must always be specified explicitly.  See the
           scsi_bus(7) man page for a list of SCSI bus device drivers.

       ·   The id parameter is a hexadecimal number in the range 0 through F
           which represents the SCSI ID used by the device on parent-bus.
           The default value for id is 0.  Note that id values above 7 are
           possible only if the parent-bus device supports Wide SCSI
           addressing.  Consult your hardware documentation to determine if
           it does.

       ·   The lun parameter is a hexadecimal number in the range 0 through
           7 which represents the SCSI Logical Unit Number (LUN) used by the
           device within its id.  The default value for lun is 0.

FILES
       Each sj device creates a single character-special device node when it
       is configured, with the pathname:

           /dev/mc/sj(parent-bus,id,lun)


       The chk.devlink command is responsible for creating and maintaining
       an additional "short-name" link to each such device node.  See the
       chk.devlink(1M) and devlinktab(4M) man pages for details.

EXAMPLES
       The following entry in a DG/UX configuration file configures a SCSI
       jukebox device at Logical Unit Number 0 of SCSI ID 3 on the SCSI bus
       named ncsc(1):

            sj(ncsc(1),3)


SEE ALSO
       scsi_bus(7), st(7), sd(7), chk.devlink(1M), devlinktab(4M).


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