After you install it you can use sas2flash -list in CLI to confirm firmware version & that it is indeed in IT mode. If not mistaken 20.00.07.00 is the latest firmware.
Output should look something like this:
root@truenas[~]# sas2flash -list
LSI Corporation SAS2 Flash Utility
Version 20.00.00.00 (2014.09.18)
Copyright (c) 2008-2014 LSI Corporation. All rights reserved
Adapter Selected is a LSI SAS: SAS2008(B2)
Controller Number : 0
Controller : SAS2008(B2)
PCI Address : 00:2d:00:00
SAS Address : 500605b-0-0471-9800
NVDATA Version (Default) : 14.01.00.08
NVDATA Version (Persistent) : 14.01.00.08
Firmware Product ID : 0x2213 (IT)
Firmware Version : 20.00.07.00
NVDATA Vendor : LSI
NVDATA Product ID : SAS9211-8i
BIOS Version : 07.39.02.00
UEFI BSD Version : N/A
FCODE Version : N/A
Board Name : IBM 6Gb Perf HBA
Board Assembly : H3-25113-02C
Board Tracer Number : SP20302384
Finished Processing Commands Successfully.
Exiting SAS2Flash.