dumpsave(ADM)

dumpsave, ldsysdump -- save or restore a system memory image dump

Syntax

/etc/dumpsave

/etc/ldsysdump dumpfile

Description

bcheckrc(ADM) calls dumpsave (provided that the system has not autobooted) to copy a system memory image dump from the swap area to tape or floppy disk. The dump may be subsequently analyzed using crash(ADM) to discover the cause of the kernel panic that produced the dump.

You can force a dump to be written to tape instead of the swap area by editing the dump entry in the /etc/conf/cf.d/sassign file (see sassign(F)) or by using the dump bootstring (see bootstring(HW)).

ldsysdump is used to copy a dump from tape or floppy disk to a file (dumpfile).

dumpsave and ldsysdump prompt for the floppy drive number (the default is /dev/rfd0) and type, or tape device to be used.

Warning

A dump is of no value unless a copy of the executable kernel that produced it is also available (this is needed for its symbol table).

For certain investigations, the fileystems in use at the time of the kernel panic should also be saved. This enables filenames to be associated with the inodes that processes had opened.

dumpsave(ADM)

Syntax

Description

Warning

See also