setting the savecore directory with dumpadm

I have a new Solaris 10 system using ZFS.  I have mounted a dedicated
drive for the sole purpose of being the crash dump repository.

I built this server, rudun-epiccache102, from a snapshot I took on
rutu-epiccache107.

because of the values in dumpadm, the system creates
the /var/crash/rutu-epiccache107 directory on startup rather than using
the /var/crash/rudun-epiccache102 directory I have created and mounted.

------------------8<------------------------
root on rudun-epiccache102# ls -lFa /var/crash
total 13
drwxr-xr-x   4 root     root           4 Jul  6 11:32 ./
drwxr-xr-x  46 root     sys           46 Jun 14 15:13 ../
drwx------   4 root     root         512 Jul  5 16:57 rudun-epiccache102/
drwx------   2 root     root           2 Jul  6 11:32 rutu-epiccache107/
root on rudun-epiccache102#

---------------------8<---------------------

I definitely want dumpadm to use the /var/crash/rudu-epiccache102 directory:

--------------------8<-----------------------
root on rudun-epiccache102# df -h /var/crash/rutu-epiccache107
Filesystem             size   used  avail capacity  Mounted on
epicpool/ROOT/June_2012/var    274G   1.3G   255G     1%    /var

root on rudun-epiccache102# df -h /var/crash/rudun-epiccache102
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/c1t0d0s0      138G   140M   136G     1%
/var/crash/rudun-epiccache102

-------------------------8<---------------------------

The values currently returned by dumpadm:

-------------------------8<----------------------------

root on rudun-epiccache102# dumpadm
     Dump content: kernel pages
     Dump device: /dev/dsk/c1t0d0s1 (swap)
Savecore directory: /var/crash/rutu-epiccache107
Savecore enabled: yes
Save compressed: on

-----------------------8<------------------------------

but when I try to change the savecore directory I get the strangest
error...

------------------------------8<---------------------------

root on rudun-epiccache102# dumpadm -d /var/crash/rudun-epiccache102
dumpadm: cannot use /var/crash/rudun-epiccache102 as dump device: Block
device required

---------------------------8<-----------------------------
What do I need to do to use /var/crash/rudun-epiccache102 as my savecore
directory?


Christopher L. Barnard
-------------------
comment your code as if the maintainer is a homicidal maniac who knows where
you live.