For
HP
Internal Use
Only
• You can modify
jetcjrc
to
specify
an
appropriately sized
target
directory for savecore.
The
next time a core
dump
occurs,
it
will be saved
to
the
new directory.
• Once a computer is down, you can specify a different
target
file system by booting
the
system in single user mode
and
running
the
savecore manually.
•
If
your system has a large physical memory, you might want
to
use
the
-i option
to
savecore. This
option
causes savecore
to
save as much
important
information as possible
after a system panic.
With
the
-i
option,
savecore saves
the
complete core file
if
there
is enough space in
the
target
directory.
If
there
is insufficient space
in
the
target
directory, savecore
-i
saves
the
kernel pages
and
(if possible) user pages
into
a compressed core file. These compressed
core files are easier
to
transport.
However,
the
analysis tools cannot be used directly on
compressed core files.
For more information on
savecore
and
its
options, see
the
entry
for savecore (1M) in
the
HP-UX
Reference
or
the
HP-UX
man
page. Also, see
HP-UX
System
Tasks.
Running savecore Manually
The
savecore command can be
run
manually. Typically, you enter a series
of
commands like
the
following:
ISL> hpux
-is
#
/etc/fsck
-p
#
/etc/mount
-a
#
/bin/df
#
mkdir
/tmp/syscore
# cd
/tmp/syscore
#
/etc/savecore
I*
to
boot
single
user
after
a
crash
*I
I*
(specify
driver
name
and
hardvare
address
*I
I*
for
the
device
you want
to
boot
from)
*I
'*
to
fix
the
file
system
*I
'*
to
mount
all
disks
(maybe
11
-a
-t
hfs
11
)
*'
'*
to
find
where
there
is
enough
space
*'
'*
assuming
/tmp
has
enough
space
*I
'*
to
save
the
core
file
to
the
current
directory
*I
If
the
system is configured with
the
primary
swap device as
the
dump
device (default
configuration), a problem can occur
if
savecore is
run
after
the
system has been brought up
multi-user.
Once
the
system
starts
back up,
it
is free
to
start
swapping over
the
swap device.
This could
corrupt
a crash image
written
out
to
the
swap device.
If
the
dump device is configured
to
use
another
logical volume or file system
rather
than
the
primary
swap device,
the
system's physical memory image remains
intact;
you can savecore
after
the
system has been brought up
to
multi-user mode.
At
this point, you can mount a
magnetic
tape
and
use
the
-t
option
to
savecore
to
save
the
system's physical memory image
to
magnetic
tape.
5-28 Troubleshooting
To Next Page
Loading...
Need help?
General