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Macbook Pro Mid 2012 2nd HDD

J

Justin19

macrumors newbie
Original poster
Oct 23, 2016
8
0
Hello,

I recently put in a second HDD in my Macbook Pro Mid 2012. Unit works fine.

Intermittently the unit will not boot and will not find the OS HDD original one.

I have to sometimes hold the option key when powering on unit to select the HDD with OS installed. although sometimes will not work either.

After a few power downs and power up it will find the OS.

Can someone please assist if they have come across this issue or a fix.
 
Are both drives bootable ones perhaps? Maybe it tries to boot from the other one if it finds it first during efi boot.
once it does boot, go to "startup disk" app and make sure the right one is selected
 
only one hard drive is set up as OS and is only one that is displayed within the System startup disk
[doublepost=1477267482][/doublepost]it seems to flicker between the Apple logo and the Circle with line through it.
 
You may have a failing internal hard drive cable. Apple is currently replacing failing or failed HDD cables in 2012 13" Macbook Pros that were purchased before January 2016 for free. Take it to the nearest AASP or Apple Store to have it looked at.
 
Intell said:
You may have a failing internal hard drive cable. Apple is currently replacing failing or failed HDD cables in 2012 13" Macbook Pros that were purchased before January 2016 for free. Take it to the nearest AASP or Apple Store to have it looked at.
Click to expand...
I did however purchase this second hand and live in Australia.. I have replaced both Hard Drives and changed them to SSD myself.

What would be the likelyhood they would still cover this?
 
It's the hard drive cable for the hard drive bay. It's likely that they'll still cover it. No matter where or who owns the machine. If Apple turns you away for non-OEM parts, take it to a AASP or replace the cable yourself. It's a cheap part and easy to replace.
 
Appreciate it strange that this has occurred as I replaced the Optical drive. Prior to this it was working fine.
 
The HDD cables are very fragile. You likely bent or bumped it just enough when replacing the ODD to cause it to start to fail.
 
Ok so now it doesnt want to start however when i hold option key when turning the machine on it find the Macintosh HDD
 
Update - now seems like errors are on OS HDD as it will not boot.

Booted into Internet based recovery and performing a "FIRST AID" Check on the OS HDD

Has come up in red "Invalid Key Length"
"The volume Macintosh SSD Could not be Verified Completely."
"ERROR: This disk needs to be repaired Click repair disk"

Now its doing a repair on volume, estimated time 4 min, seems to be a lot longer - will let it do its thing for a while
[doublepost=1477288385][/doublepost]No luck hasnt moved at all.
 
If you want to ascertain if it -IS- the cable, you need to swap the location of the two drives.
If the -new- HDD starts acting flaky, while the old one again runs fine --- it's the cable.

Go to ifixit.com to find the ribbon cable part number that you need.
You can buy the cable from them, also.

Or -- buy it online or at ebay.
 
Fishrrman said:
If you want to ascertain if it -IS- the cable, you need to swap the location of the two drives.
If the -new- HDD starts acting flaky, while the old one again runs fine --- it's the cable.

Go to ifixit.com to find the ribbon cable part number that you need.
You can buy the cable from them, also.

Or -- buy it online or at ebay.
Click to expand...

Ok so i reformatted the SSD and reloaded OS onto it. Installed fine and booted no issues.

Shut it down and turned back on again could not find OS.

Strange.

I guess i will swap the two drives around.
 
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