Boot mirror on Ultra 20

Dear managers,

we have plugged a second 80GByte disk into a Ultra 20 and would like to mirror the boot disk like we do on SPARC machines but the known procedure does not work for us.

dd if=/dev/rdsk/c1d0s2 of=/dev/rdsk/c2d0s2 count=16
16+0 records in
16+0 records out

metadb -a -f -c 2 c1d0s7
metadb: sunrayi: c1d0s7: overlaps with c1d0p1 which is mounted as '/diagpart'

prtvtoc /dev/rdsk/c1d0s0
* /dev/rdsk/c1d0s0 partition map
*
* Dimensions:
*     512 bytes/sector
*      63 sectors/track
*      64 tracks/cylinder
*    4032 sectors/cylinder
*   38736 cylinders
*   38734 accessible cylinders
*
* Flags:
*   1: unmountable
*  10: read-only
*
*                          First     Sector    Last
* Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
       0      2    00   15474816 140700672 156175487   /
       1      3    01      12096   1052352   1064447
       2      5    00          0 156175488 156175487
       3      7    00    5233536  10241280  15474815   /var
       4      0    00    1132992   4100544   5233535
       7      0    00    1064448     68544   1132991
       8      1    01          0      4032      4031
       9      9    01       4032      8064     12095

prtvtoc /dev/rdsk/c2d0s0
prtvtoc: /dev/rdsk/c2d0s0: Invalid VTOC

We are stuck. What am I missing?

Thanks a lot!

Regards,

  Andreas
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