metaclear queries

Hi,

We have a T2000 server running Solaris 10.

I tried to perform metaclear but not successful:

# metaclear /dev/md/dsk/d3

metaclear: <server name>: d3: metadevice is open

# df -h

Filesystem             size   used  avail capacity  Mounted on

/dev/md/dsk/d20        9.8G   8.4G   1.4G    86%    /

/devices                 0K     0K     0K     0%    /devices

ctfs                     0K     0K     0K     0%    /system/contract

proc                     0K     0K     0K     0%    /proc

mnttab                   0K     0K     0K     0%    /etc/mnttab

swap                   6.1G   1.7M   6.1G     1%    /etc/svc/volatile

objfs                    0K     0K     0K     0%    /system/object

sharefs                  0K     0K     0K     0%    /etc/dfs/sharetab

/platform/SUNW,Sun-Fire-T200/lib/libc_psr/libc_psr_hwcap1.so.1

                       9.8G   8.4G   1.4G    86%    /platform/sun4v/lib/libc_psr.so.1