Issue is fixed.
I have started jumpstart installation command with "boot net -s"
net = network
s = single user mode
Single user mode is read-only mode. so I must mount our HDD to /a
# mount /dev/dsk/c0t0d0s0 /a
# cp /a/lib/libc.so.1.1 /a/lib/libc.so.1
# init 6
Thats all.
Thank you unix.com family and other friends.