AgentVideo.ru wrote:
I'm researching of upgrade my Mac Pro 3.1 (2008) as it has slow SATA-II connection and now it works very slow on OS X 10.11.6. So, I looked for buying RAID card. But understand that it is SATA-II compatible, not SATA-III.
Also, I don't understand difference between hardware RAID and software raid included in OS X. I have speed up with soft-RAID 0.
Returning to your question.
It is surely uncompatible. And I think it is because of two reasons:
- It is SATA-II (but Mac Pro 2010 has SATA-III).
- It has the iPass cable. Someway it maybe incompatible with newest Mac Pro's.
No classic Mac Pro has SATA III drive connections, they all have SATA II including the 2010 and 2012 models. As mentioned by others here the fastest upgrade is a PCIe card with a PCIe SSD drive. It is however possible to upgrade the main drive bays to SATA III if you wish although they will still not be as fast as a PCIe SSD.
To do this the steps depend on which model classic Mac Pro you have, as you have a 2008 aka. MacPro3,1 it is actually easier and cheaper. In your case all you need is a PCIe SATA III card and a cable. You unplug the existing miniSAS cable from the Mac Pro logic board, use an extension cable and then connect it to a suitable PCIe SATA III card.
Extension cable - https://eshop.macsales.com/item/MaxUpgrades/SZDCMSASR2MS/
Suitable PCIe card - https://www.startech.com/uk/Cards-Adapters/HDD-Controllers/SATA-Cards/PCI-Expres s-SATA-III-RAID-Controller-Card-Mini-SAS-SFF-8087~PEXSAT34SFF
Another suitable card - https://www.attotech.com/products/adapters/sas-sata/6gb-pcie-30/ESAS-H644-000
This one is a RAID - https://www.attotech.com/products/adapters/sas-sata-raid/6gb/ESAS-R644-000%20ESA S-R644-C00
See - http://blog.macsales.com/12247-upgrade-your-06-08-mac-pros-internal-bays-to-sata -3-0
It is also possible in the 2010 and 2012 models but they require new special drive sleds as well increasing the cost.
Note: A traditional hard disk even if a SATA III drive will not see a noticeable improvement - they are simply too slow, a SATA III SSD drive will however see a big improvement.
PS. The Apple RAID cards are SATA II only and also limited to a maximum drive size of I believe 2.7TB. The card for a 2008 is different to a card for a 2010/12 Mac Pro.