Chosen Solution
Hi, I have installed a second 1TB HDD in place of the superdrive but it is not working well. File reads from that HDD, file transfers to and from that HDD all result in a beach ball. If I try to do big transfers the HDD vanishes from the system! I have to reboot to see the HDD again! Searching online I found this - http://blog.macsales.com/14982-efi-updat… I thought problem solved. The Apple site with the update also states its for mid 2012 macbook pros - https://support.apple.com/kb/DL1593?loca… However whenever I try to install the update it states “This update is not for this system”. I am not sure but I think this is because I have OSX El Capitan running, rather OSX Lion or Mountain Lion. I have OSX ML on an external HDD. Should I use it to boot my laptop and then apply this update? Will putting back the drive with El Capitan after the update cause any issues? Is there something else I can do or should I just get an Intel 320 600 GB SATA II SSD instead for the optibay?
Both of your HD’s are SATA III (6.0 Gb/s) drives. If we review the systems specs MacBook Pro 13" 2.5 GHz i5" (Mid-2012) your systems HD SATA port is SATA III but your systems optical drive port could be only SATA II (3.0 Gb/s). Using this as a reference: OWC Data Doubler We can see OWC lists their carrier as workable with your system (SATA III). So from what you have things should work. So that leaves us the more likely issue here is the HD’s SATA cable is not up to spec. Which is a common problem in this MacBook Pro series, I would start there. MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable - Apple Part: 923-0104 Follow this IFIXIT guide: MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement
A very useful post - I thank all who have contributed. Gautam, just trying to clarify what worked. Was it swapping the secondary HDD in the optical bay (I assume traditional platter mechanism) with an SSD? I too get a lot of beach balling with my similar setup. I attribute this to the fact that the secondary drive in the optical is a mechanical HDD. Will replacing that with an SSD solve my issues?
i have the same issue primary drive is crucial m500 1 tb and i upgraded my secondary drive to firecuda 2 tb sshd,when i try to copy something,says reading error,but i can enter in it and can use everything inside it,but when i copy to ssd or to flash disk etc,it doesnt work..
