у меня так работает:

( backup_db )
set -x;
DBName=$2


db2 connect to $DBName;
db2 quiesce db immediate force connections;
# db2 CONNECT RESET
db2 terminate; db2 force application all; sleep 20s;
db2 deactivate database $DBName;
db2 list active databases;

db2 backup db $DBName to "'"$3"'"
#DEDUP_DEVICE;

db2 activate database $DBName;
db2 connect to $DBName;
db2 unquiesce db;
# db2 CONNECT RESET
db2 terminate; db2 force application all;
;;

для принудительной остановки:

stop_db2()
{
# set -x;

ssh xxx-host-db db2start;

DB2StopCmd1="db2 terminate; db2 force applications all; db2 force applications all; db2 deactivate database asv; sleep 5s; db2stop force";


DB2StopCmd2="db2 force applications all; su -lc ipclean db2inst; db2 force applications all; sleep 5s; db2stop force; sleep 1s; db2start; db2stop force";



for N in 4 5 6 7 8 9 10
do
T=$[N*5];

if timeout $T"m" ssh xxx-host-db $DB2StopCmd1; then
{
return 0;
}
else
{

timeout $T"m" ssh xxx-host-db $DB2StopCmd2 | tee /tmp/Result.txt;
Result=$?;

if [ $Result == 0 ]; then # || (cat /tmp/Result.txt | grep SQL1032N ); then # 0 - stopped now
{
return 0;
}
else
{
Log "Trying to stop DB2 again in 60s ...";
sleep 1m;
}
fi;
} fi;
done;


return 11;

}

почти всегда останавливает, даже когда db2 капризничает