Comments 3 Posted In Red Hat Enterprise Linux If my operating system is RHEL 5, can the High-Availability add-on be addded? Latest response 2012-08-10T05:43:42+00:00 As subject, my base channel is RHEL 5 64bit X 86, and under my account, there is also High-Availability. Can HA be added to RHEL5? Or it must be RHEL 6? Any clarification is appreciated. AZ Started 2011-12-06T04:59:53+00:00 by Alex Zhao Active Contributor 210 points Log in to join the conversation Responses Sort By Oldest Sort By Newest Red Hat Guru 3695 points 6 December 2011 2:20 PM andriusb Hi Alex, It all depends on when you purchased your subscription. When we released RHEL 6.0 last year we changed the way we sold SKUs and how they are packaged. We went to an add-on model since customers that purchased RHEL 5 Advanced Platform didn't always need all the product components included in it. So if the product description you purchased shows as a RHEL 5 timeframe Advanced Platform entitlement, you should be OK. But if you have RHEL 6 timeframe SKU, you will need to purchase the add-ons required for High Availability. Refer to: http://www.redhat.com/summit/2011/presentations/summit/whats_new/friday/riveros_f_1100_choosing_the_right_subscription.pdf and the actual video of the presentation: https://access.redhat.com/knowledge/videos/red-hat-summit-2011-choosing-right-red-hat-enterprise-linux-subscription If you have any further questions, don't hesitate to create a support ticket and refer to this forum post. Regards, Andrius Red Hat., Inc. ns Active Contributor 124 points 10 August 2012 2:01 AM nsn_csi-global One Problem is, that depending on the HW you are using (i.e. if you dont have a SAN and dont use GFS) you might need DRBD. And DRBD is not "natively" supported by RedHat if I understood it right, you need an extra contract with LinBit. Nevertheless, if you only want to use the DRBD SW and can still sleep at night even without commercial support, you can always get "quite recent" DRBD rpms from here: http://packages.atrpms.net/dist/el6/ Red Hat Guru 25394 points 10 August 2012 5:43 AM David Powles You're on a bit of a roll with these posts, Mario! Thanks for your ongoing contributions today.