dumpsave(1M) — Reliant UNIX 5.44c4

dumpsave(1M)                                                   dumpsave(1M)

NAME
     dumpsave - save a system dump

SYNOPSIS
     dumpsave [-c] [-q] [-d dumpdir] [-s swapfile] [-o]

DESCRIPTION
     The dumpsave command should be called during the system boot process.
     Its function is to save a system dump from the swap device to a regu-
     lar file.

     dumpsave checks the swap device to see if a system dump exists. If one
     is found, it saves the system dump to the system dump directory, and
     also copies /unix there. If the system dump is saved successfully, the
     dump header is cleared from the swap device so that successive runs of
     dumpsave will not resave the same system dump. Both the dump and a
     copy of /unix are given an identical numeric suffix. The suffix used
     is the lowest number that doesn't already appear.

     dumpsave initializes several parameters from /etc/default/dumpsave:

          DUMPDIR=/var/crash
          MINFREE=4096
          UNIXFILE=/unix
          SWAPFILE=/dev/swap
          TMPDEV=temporary-name-for-devices
          ULIMIT=ulimit-value

     The first two, DUMPDIR and MINFREE are present by default, but can be
     modified or removed. The next four, UNIXFILE, SWAPFILE, TMPDEV, and
     ULIMIT, can be added.

     DUMPDIR specifies the system dump directory. MINFREE specifies the
     minimum number of 512 byte blocks that should be left free on the
     filesystem containing DUMPDIR. If the dump, or /unix, or both will not
     fit in DUMPDIR without leaving MINFREE blocks free, it will not be
     saved.

     Typically UNIXFILE is /unix and SWAPFILE is /dev/swap. TMPDEV is the
     pathname of a device that will be created and removed by dumpsave when
     the dump spans more than one swap device. The value of ULIMIT is nor-
     mally unlimited, but can be set lower.

OPTIONS
     -c   Checks if the dump exists, but will not save or clear it. Returns
          0 if the dump exists, otherwise 1.

     -q   Quiet. A less verbose mode.

     -d dumpdir
          Directory to which the dump file and /unix will be copied.




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dumpsave(1M)                                                   dumpsave(1M)

     -s swapfile
          The source of the dump will be swapfile instead of /dev/swap.

     -o   The memory dump is not written to the directory specified with
          dumpdir rather to standard output for further processing. This
          option is intended for writing the memory dump to tape.

DIAGNOSTICS
     The dumpsave command exits with a status of 0 if the dump exists and
     was successfully saved, otherwise non-zero.

FILES
     /dev/swap

     /dev/tmpdumpdev

     /etc/default/dumpsave

     /unix

     /var/crash

SEE ALSO
     dumpsave(4).






























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