ASM disks with UNKNOWN header status, can't create disk group

* Oracle 10.2.0.2 on RHEL4.
* We have two 900gb LUNs using RAID 10.
** SysAdmin says no multipathing is involved.  We do use Veritas DMP
elsewhere in the SAN, fwiw.

Giving this crazy ASM fad another shot.

We ran through "oracleasm configure" and "oracleasm createdisk" on
each of the two disks, with no problems.  "oracleasm listdisks" lists
the two created volumes (VOL01 and VOL02) just fine.  However when I
launch dbca to create the disk group, I get an ORA-15072 error.
Googling around led me to some forum posts about clashes with external
redundancy (which we're using) and multipathing (which we're not).  I
also found this query, which I ran on our ASM instance:

SQL> select state,header_status,substr(name,1,12) Name,free_mb,
substr(path,1,16) PATH from v$asm_disk;

STATE    HEADER_STATU NAME            FREE_MB PATH
-------- ------------ ------------ ---------- ----------------
NORMAL   UNKNOWN                            0 ORCL:VOL02
NORMAL   UNKNOWN                            0 ORCL:VOL01

I'm open to any and all suggestions (regarding ASM, anyway).

-- 
Don Seiler
http://seilerwerks.wordpress.com
ultimate: http://www.mufc.us
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