I'm looking at growfs command...
uname -a :
SunOS unknown 5.9 Generic sun4u sparc SUNW,Ultra-5_10
df -k :
Filesystem kbytes used avail capacity Mounted on
/dev/dsk/c0t0d0s0 2031101 1098483 871685 56% /
/dev/dsk/c0t0d0s5 95951 37884 48472 44% /var
/dev/dsk/c0t0d0s6 2031101 588630 1381538 30% /stg
/dev/dsk/c0t0d0s7 492422 14 443166 1% /export/home

hm.., I should have been more specific from very beginning. This is a single disk ultra5 machine and I dont have enough space to load 9_Recomm patches. When I started running ./install_cluster, it aborted with "not enouhgt space in /var/sadm.." message. I know that I have some unallocated space on the disk which I was trying to use to add space to /dev/dsk/c0t0d0s5. Do you think it's possible?

thanks in advance,
JV