Hello,

We have a setup with  1 MD3220i, 2X R815 hosts running esxi 4.1U3 free and 2 X 5548 switches.

We just purchased another MD3220i (not installed yet) and are planning to upgrade hosts to esxi 5.1 free. I have been told that the older firmware in MD3220i has problems with esxi5.5. Can you suggest what is the best upgrade path for our system with this configuration. I don't know what the new MD came with since I have not yet powered it on. 

MDSM 10.80.G6.81

Current configuration
Firmware version: 07.80.41.60
NVSRAM version: N26X0-780890-001
AMW version: 10.80.G6.61

iSCSI RAID controller module
Vendor: ServerEngines Corporation
Part number: ServerEngines SE-BE4210-S01
Serial number: 782bcb77b2a9
Firmware revision: 2.300.310.15

hard drive 1 (12 of these 600GB 10K)

Product ID: ST9600205SS 

Physical Disk Firmware Version: CS05

hard drive 2 (12 of these 900GB 10K)

Product ID: ST9900805SS
Physical Disk Firmware Version: CS08

Thanks