I have a server SuperServer 6025B-3R:
http://www.supermicro.com/products/system/2u/6025/sys-6025b-3r.cfm

with raid adapter AOC-LPZCR3:
http://www.supermicro.com.tr/AOC-LPZCR3.cfm.htm
A have a raid 5 inside with 3 HDD + 1spare using seagate enterprise ST350032 500GB (each hdd).

Because we need more space I buy new hdd and I have problem to detect it.
SEAGATE SATA 2TB 7200RPM 6Gb/S 64MB Constellation ES.2 (ST32000645NS)

and the "initialize" option is inactive.

I have also tried from dos program and for "initialize" option the hdd are not listed. In disk utility I can see it and I can use format option.

I have tried with several hdd drives (wd 1TB sata2, ST80GB,..etc), and is working whit this model is not.

Please can you help me and tel us if is a compatibility issue or a setup issue. Maybe a firmware update can solve this issue (i cannot see a new version on your site), or reinstall of firmware (with reinstall option the old raid will be affected?)