Q: Primary hard disk not detected 50% of the times on boot up
I have a Macbook Pro Mid 2012 model with the following changes:
- 16 GB Ram upgrade
- DVD drive replaced with bay and old (existing) 500 GB hard disk for storage
- Main hard drive replaced with 250 GB SSD (Samsung EVO 850)
- Windows 10 via Bootcamp
- Mac OS X Yosemite
- Refind installed on bootup
Recently, my existing SSD hard disk was giving me lots of issues - so I got a new one and SuperDuper'ed the existing one onto it. Formatted the Windows partition and re-installed Windows 10.
I have 50 Gigs on the Mac drive and 200 Gigs on Windows.
The issue that I am facing is that on every other bootup, the Mac does not detect the primary hard disk.
If I press OPTION and hold it, I can see only the 500 Gig data drive (which is not bootable).
I then need to restart and hold COMMAND+R (or D) to get into internet recovery mode, wait till the network selection appears.
Then when I reboot, I am presented with the original hard disk and multiple boot options (Mac / Windows) on Refind.
I don't think it is a refind issue as this occurs even with Refind uninstalled.
This also does not happen when I plug in my old (failing) SSD.
What could be going wrong on the new Hard drive and what can I do to trouble shoot the issue?
Thanks.
MacBook Pro, Mac OS X (10.2.x) , Macbook Pro Mid 2012
Posted on Aug 24, 2016 9:22 PM