How to extend a filesystem??

OK I'm sure this question has been posed far too many times.

I have solaris 10 x86 with NO Veritas or Disksuite filesystems. Below is the output of df -k

# df -k
Filesystem            kbytes    used   avail capacity  Mounted on
/                    10485760  547513 9317128     6%    /
/dev                 10485760  547513 9317128     6%    /dev
/lib                 10331209 3080148 7147749    31%    /lib
/ora01               5242880 2858882 2235006    57%    /ora01
/ora02               2609152 2065798  509399    81%    /ora02
/ora03               2609152 2102614  474882    82%    /ora03
/ora04               31457280 19182862 11507317    63%    /ora04
/ora05               10485760 2098596 7862973    22%    /ora05
/ora06               1048576000 979585795 64678369    94%    /ora06
/oratemp             4194304  676014 3298402    18%    /oratemp
/platform            10331209 3080148 7147749    31%    /platform
/rams/data           104857600 28160518 71903551    29%    /rams/data
/rams/raid           10485760 3223980 6807975    33%    /rams/raid
/sbin                10331209 3080148 7147749    31%    /sbin
/usr                 10331209 3080148 7147749    31%    /usr
proc                       0       0       0     0%    /proc
ctfs                       0       0       0     0%    /system/contract
swap                 11713456     272 11713184     1%    /etc/svc/volatile
mnttab                     0       0       0     0%    /etc/mnttab
/usr/lib/libc/libc_hwcap2.so.1
                     10331209 3080148 7147749    31%    /lib/libc.so.1
fd                         0       0       0     0%    /dev/fd
swap                 11740104   26920 11713184     1%    /tmp
swap                 11713208      24 11713184     1%    /var/run
/usr/local           1048576   62976  924041     7%    /usr/local
/ora19               891289600  294208 884034568     1%    /ora19
/ora_backup          524288000 80915373 415661840    17%    /ora_backup

I want to reallocate 200Gb from /ora_backup to /ora19 ..... or simply grow /ora19 by 200Gb.
also the format command shows no disks found!

Thanks for any help

jackie.

format command shows no disks??? you're in a zone? then of course you wont. If you're not, then at least you need to be a superuser "root"