pmttapetab(4M)                  TCP/IP 5.4.2                  pmttapetab(4M)


NAME
       pmttapetab - table of remote tape devices

DESCRIPTION
       The file /etc/pmttapetab contains an ASCII table describing magnetic
       tape devices on remote hosts.  It associates local pseudo tape
       devices with these remote tape devices.  The system administrator can
       modify its contents with a text editor.  It is read by the pmtd(1M)
       daemon, which performs remote tape access across a network.

       The file consists of a number of lines of the following format:

            pseudo  host  os  real  rmtdir  block  cache

       where:

       pseudo   the local pseudo tape device.  It should be the name of the
                particular special file created at boottime in the /dev/pmt
                directory.  This is a filename.

       host     the name of the remote host machine.  This machine MUST have
                the name of the client machine (the one running pmtd(1M)) in
                its /etc/hosts.equiv file.

       os       the name of the operating system running on host.  This
                should be one of the operating system names specified in
                /etc/pmterrtab.

       real     the remote real tape device, that is, the device name on
                host.  Only character special devices should be named.  This
                is a full pathname.

       rmtdir  the name of the directory on host that contains the rmt(1)
                daemon executable.  This is a full pathname.

       block    a modulo block size that the remote hardware requires.  The
                size of data transfers must be an integer multiple of this
                value.  A value of 0 indicates that the remote hardware has
                no block size requirement.

       cache    a flag specifying that data transfers should be cached.
                Specify Y to cache and N not to cache.

       You should use spaces or tabs to separate fields.  Lines beginning
       with a # are ignored.  They may be used to add comments.  If you need
       to use spaces or tabs in the real field, surround the contents of the
       field with double quotes.

       It is the responsibility of the system administrator to maintain this
       file and keep it up to date.

EXAMPLE
       For example, assume /etc/pmttapetab contains the following entry:




Licensed material--property of copyright holder(s)                         1

pmttapetab(4M)                  TCP/IP 5.4.2                  pmttapetab(4M)


            0n     atlanta     dg     /dev/rmt/0n     /etc     512     N

       In this case, entering the following command line would access the no
       rewind rmt 0 device on the host atlanta:

            tar -xvf /dev/pmt/0n

       sysadm considers pmt devices to be valid input mediums.

FILES
       /etc/pmttapetab   Table with information about remote tape devices.
       /etc/pmterrtab    Table of equivalent error numbers.
       /etc/hosts.equiv  List of trusted host machines.

SEE ALSO
       pmtd(1M), rmt(1M), hosts.equiv(4M), pmterrtab(4M), pmt(7), rmt(7).

CAVEATS
       The real device name on the remote host must be a character special
       device.  Typically these are kept in the host's /dev/rmt directory.
       Programs that read /etc/pmttapetab will assume the real tape devices
       listed are character special.

       No-rewind-on-close pseudo entries should only be paired with no-
       rewind-on-close real entries in the /etc/pmttapetab file.  The same
       follows for rewind-on-close entries.































Licensed material--property of copyright holder(s)                         2