Question For LSI Host Bus Adapter (HBA) firmware, what is the difference between IT mode and IR mode? Answer The two firmware types are Initiator Target (IT) and Integrated RAID (IR). IR is the typical hardware RAID firmware that the internal cards or boards ship with. The IT firmware, on the other hand, is the Initiator Target firmware which is designed to allow a SAS HBA to connect to up to 256 devices using SAS Expanders. The IT firmware is typically shipped on external cards. The IT firmware does not have any RAID capabilities and simply acts as an HBA. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) P P B B FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 16169 Other: - Firmware/BIOS related - Support Information Peripherals: - RAID card - Riser Cards Storage: - Expanders - SAS 05/10/13     Print Answer