We recently introduced centos6 support to address the end of life of centos5. A new ISO installer is available that can be burned on a DVD.
Keep in mind you can't run a cluster of HSMX where one is on centos5 and the other on Centos6
Before starting the installation of the HSMX firmware based on Centos6 you need to take a backup of the current HSMX.
See Create a backup
Note: Don't forget to download the backup to your PC because the entire disk will be wiped during the upgrade process.
Make a screenshot of the interface order. It is possible the interface order changes when when the new HSMX software is installed. Especially when you have ethernet expansion cards or already have a custom interface order.
As a first step after the install of the OS check the interface order when you gain access to HSMX.
Boot from CDrom
choose Install HSMX or the automated one) below we describe “Install HSMX”
See Backup / Restore