1) Get the quotas file from netapp
[root@unixfoo-l-adm root]# rsh unixfoo-nfs1 rdfile /etc/quotas > /tmp/quotas
2) Edit the quotas file and change the quota for the required qtree.
[root@unixfoo-l-adm root]# vi /tmp/quotas
Example : Edit quotas as below
/vol/vol1/qtree1 tree 250G #(Old entry)
to
/vol/vol1/qtree1 tree 300G #(New entry)
3) Upload the quotas file to Netapp
[root@unixfoo-l-adm root]# rsh unixfoo-nfs1 wrfile /etc/quotas < /tmp/quotas
4) Use Quota resize command to resize the qtree quota.
[root@unixfoo-l-adm root]# rsh unixfoo-nfs1 quota resize vol1
5) Done.