Can you tell me where you got this version firmware.
I have a 4805SAS that I bought on eBay that came with 5.2.0 15617. I saved it on a floppy and loaded it in my other 4805SAS cards. 15611 would not detect my WDC RE4 2TB drives whereas 15617 does. I just bought 4 RE4 2TB drives and without the firmware update they were expensive bricks.
I am unable to find a download location for build 15617.
6 x WDC RE4 500GB WD5003ABYX (RAID 6)
2 x WDC RE4 2TB WD2003FYYS (RAID 1)
ASM 7.3.00 (18837) Works fine
Win SBS 2011-E