topic Re: can I hot-add DS4246 shelf to a existing FAS2720 with a DS212C shelf in ONTAP Hardware https://community.netapp.com/t5/ONTAP-Hardware/can-I-hot-add-DS4246-shelf-to-a-existing-FAS2720-with-a-DS212C-shelf/m-p/468183#M12177 <P>Just be mindful that ONTAP support for all SAS2 (IOM6-based) shelves is removed starting with ONTAP 9.16.1.</P> Thu, 16 Jul 2026 14:58:33 GMT andris 2026-07-16T14:58:33Z can I hot-add DS4246 shelf to a existing FAS2720 with a DS212C shelf https://community.netapp.com/t5/ONTAP-Hardware/can-I-hot-add-DS4246-shelf-to-a-existing-FAS2720-with-a-DS212C-shelf/m-p/468155#M12175 <P>Hello,</P><P>&nbsp; &nbsp; &nbsp; as per this document(<A href="https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/How_to_cable_an_IOM12E_platform_with_IOM6_and_IOM12_storage_shelves_in_Multi-Path_HA" target="_blank">https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/How_to_cable_an_IOM12E_platform_with_IOM6_and_IOM12_storage_shelves_in_Multi-Path_HA</A> ), FAS2720 with embedded shelf need meet strict rule when using a mix IOM6 &amp; IOM12 stack. The above document only states that a new cabling installation is permitted. Is it possible to hot-add a DS4246 to FAS2720 with a DS212C in a stack?(refer to the cabling figure below) I didn't find the document about. Please advise, thanks a lot.</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="cabling.png" style="width: 400px;"><img src="https://community.netapp.com/t5/image/serverpage/image-id/34027iDFCB2F4B3A4B76C9/image-size/medium?v=v2&amp;px=400" role="button" title="cabling.png" alt="cabling.png" /></span></P><P> </P><P>&nbsp;</P><P>&nbsp;</P> Wed, 15 Jul 2026 17:12:32 GMT https://community.netapp.com/t5/ONTAP-Hardware/can-I-hot-add-DS4246-shelf-to-a-existing-FAS2720-with-a-DS212C-shelf/m-p/468155#M12175 Daniel_66 2026-07-15T17:12:32Z Re: can I hot-add DS4246 shelf to a existing FAS2720 with a DS212C shelf https://community.netapp.com/t5/ONTAP-Hardware/can-I-hot-add-DS4246-shelf-to-a-existing-FAS2720-with-a-DS212C-shelf/m-p/468177#M12176 <P>I tested the above cabling method, It is supported to hot-add a DS4246 to a existing DS212C stack on FAS2720</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="hot-adding shelf.png" style="width: 400px;"><img src="https://community.netapp.com/t5/image/serverpage/image-id/34030iF31A98C1838E534F/image-size/medium?v=v2&amp;px=400" role="button" title="hot-adding shelf.png" alt="hot-adding shelf.png" /></span></P><P><A href="https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Can_I_add_an_IOM6_at_the_end_of_a_mixed_stack_of_IOM6_and_IOM12" target="_blank" rel="noopener">https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Can_I_add_an_IOM6_at_the_end_of_a_mixed_stack_of_IOM6_and_IOM12</A></P> Thu, 16 Jul 2026 14:04:19 GMT https://community.netapp.com/t5/ONTAP-Hardware/can-I-hot-add-DS4246-shelf-to-a-existing-FAS2720-with-a-DS212C-shelf/m-p/468177#M12176 Daniel_66 2026-07-16T14:04:19Z Re: can I hot-add DS4246 shelf to a existing FAS2720 with a DS212C shelf https://community.netapp.com/t5/ONTAP-Hardware/can-I-hot-add-DS4246-shelf-to-a-existing-FAS2720-with-a-DS212C-shelf/m-p/468183#M12177 <P>Just be mindful that ONTAP support for all SAS2 (IOM6-based) shelves is removed starting with ONTAP 9.16.1.</P> Thu, 16 Jul 2026 14:58:33 GMT https://community.netapp.com/t5/ONTAP-Hardware/can-I-hot-add-DS4246-shelf-to-a-existing-FAS2720-with-a-DS212C-shelf/m-p/468183#M12177 andris 2026-07-16T14:58:33Z