There are new features in 5.1.x and other improvements.  So if you are running ESX for example it's worth considering 5.1.x since it has more support for ESX v5.x features.   It's really down to how your company handles newer releases.  Some people won't use something new until it's gone through several patch cycles.   If you do decide to stay with 5.0.x please do upgrade to 5.0.8 for the latest fixes.   Going forward, new HW platforms will requires 5.1.x firmware.   There's no reason NOT to upgrade to 5.1.x,  I'll put it that way.   Hope this helps.  -don 
Hi together, I have an EQL PS600 storage with the firmware version 5.0.5. I'm planing to update the firmware to the current version. But DELL/EQL is providing two versions now: 5.0.8 and 5.1.1-H2. And I could not find any information that would help me to decide, which version we should install. Can somebody help me with an advice? Thank you in advance for your quick answers :-) Kind regards, Hermann
Which Firmware to prefer 5.0.x or 5.1.y