https://community.netapp.com/t5/ONTAP-Discussions/upgrade-ONTAP/m-p/467331#M45399 <P>hello and sorry for my english,</P><P><BR />I always do updates on my Netapp equipment. I now in version&nbsp;<STRONG>9.15.1P17</STRONG> on all clusters !</P><P>I'd like now to upgrade to new version. I have:<BR /><STRONG>AFF-C250</STRONG><BR /><STRONG>FAS2720</STRONG><BR /><STRONG>FAS2820</STRONG></P><P>&nbsp;</P><P>Witch version i have to choose for upgrade ? 9.16, 9.17 or 9.18 ?<BR />i'd like same version on all clusters, easier...</P><P>&nbsp;</P><P>Can i have troubles when upgrade ?</P><P>&nbsp;</P><P>i use CIFS share, ISCSI volumes and NFS volumes for Vmware,&nbsp;<SPAN>Consistency group with mediator (business continuity), snapmirror, antiransomware</SPAN></P><P>thanks a lot</P> Wed, 20 May 2026 09:27:39 GMT mulbzh 2026-05-20T09:27:39Z https://community.netapp.com/t5/ONTAP-Discussions/upgrade-ONTAP/m-p/467331#M45399 <P>hello and sorry for my english,</P><P><BR />I always do updates on my Netapp equipment. I now in version&nbsp;<STRONG>9.15.1P17</STRONG> on all clusters !</P><P>I'd like now to upgrade to new version. I have:<BR /><STRONG>AFF-C250</STRONG><BR /><STRONG>FAS2720</STRONG><BR /><STRONG>FAS2820</STRONG></P><P>&nbsp;</P><P>Witch version i have to choose for upgrade ? 9.16, 9.17 or 9.18 ?<BR />i'd like same version on all clusters, easier...</P><P>&nbsp;</P><P>Can i have troubles when upgrade ?</P><P>&nbsp;</P><P>i use CIFS share, ISCSI volumes and NFS volumes for Vmware,&nbsp;<SPAN>Consistency group with mediator (business continuity), snapmirror, antiransomware</SPAN></P><P>thanks a lot</P> Wed, 20 May 2026 09:27:39 GMT https://community.netapp.com/t5/ONTAP-Discussions/upgrade-ONTAP/m-p/467331#M45399 mulbzh 2026-05-20T09:27:39Z