Chosen Solution
I have an i5 quad 27" iMac mid-2011 with a 1TB HDD. Due to drags I made a radical decision to install SSD, but I’m not sure that I need to refuse 1 TB HDD and replace it on 500 gb SSD. May be the best way is to leave my HDD and to install 128 gb or 256 as a second drive under dvd rom? What are pros and cons of the second idea in respect to the effiecency and speed? If you’ll give me an advice to leave my hdd, what should I buy for the OS, programs (Photoshop, Capture One) etc distribution - 128 or 256 SSD? I plan to use this configuration as a Fusion Drive.
First if you deside to replace your HD for a SSD you’ll need to add in an external thermal sensor to replace the now missing HD’s sensor. Here is what you’ll need: OWC In-line Digital Thermal Sensor for iMac 2011 Hard Drive Upgrade and you’ll need a 2.5" to 3.5" adapter frame to hold the 2.5" SSD. Like this one: OWC 2.5" to 3.5" Drive Adapter Bracket So unless you are going with a large SSD I would focus on adding the SSD as a second drive following this IFIXIT guide: Installing iMac Intel 27" EMC 2429 Dual Hard Drive Kit As to the SSD’s size a 128 GB should be fine if you plan to configure it as a Fusion Drive set.
