Other World computing (OWC) reports that the MacBook Pro EFI 2.2 firmware update fixes some issues with the SATA 6G port in the main drive bay:
If you're not familiar with it, the short form is that in many 17″ 2011 MacBook Pros (and some 15″ and 13″ as well) had problems with SATA 3.0 Revision SSDs such as the Mercury EXTREME Pro 6G—through no fault of the SSD— resulting in spotty performance, beach ball timeout delays, and even complete failure to recognize SATA 3.0 6Gb/s SSDs at all.
Well, if you ran Software Update this morning, MacBook Pro EFI Firmware Update 2.2 appears to be the answer. Nearly seven months after these machines first became available, all indications are that we can now reliably count on taking full advantage of the 6Gb/s capability provided.
Apple has somewhat dodged giving any direct response on the issue itself, but this long awaited solution just happens to be there in this update with the official description on Apple's support site only mentioning the update as addressing Lion Internet Recovery and Thunderbolt. We are very thankful and excited to see the 'quiet' fix for 6Gb/s SATA 3.0 main bay drive reliability as a further benefit of this update.
Very important points though concerning the optical bay
#1 – if your MacBook Pro 2011 model currently has SATA 2.0 3Gb/s reported for your optical bay max link speed, this EFI update does not change that to SATA 3.0 6Gb/s. It really makes no difference for the optical drive, but if you wish to add an additional 9.5mm hard drive or SSD with a product such as our Data Doubler, you can continue to do so with pretty much any 3G or 6G drive of your choosing.
#2 – For those with a MacBook Pro 15″ or 17″ model that has SATA 3.0 6Gb/s link capability reported, it is very important to note that this EFI update does not appear to have resolved reliability of using a 6Gb/s drive in the optical bay. If you have a 6Gb/s optical drive bay connnection and are using a product like our Data Doubler, we still recommend only using a SATA 2.0 3Gb/s drive in that bay. MacBook Pro 13″ owners who find 6Gb/s links in their optical bay are not experiencing issues with 6Gb/s drives and this update doesn't affect that usage.
This all sounds good, but still Apple has not stepped up to the plate with a full SATA 6G capable MacBook Pro without issues in both bays. Perhaps the rumored “speed bump” will do something about this in hardware.