crwdns2936637:0crwdne2936637:0 crwdns2853008:0crwdne2853008:0 crwdns2918746:0crwdne2918746:0
crwdns2918538:0crwdne2918538:0

crwdns2934243:0crwdne2934243:0 mayer

crwdns2934249:0crwdne2934249:0:

I'm a bit confused, exactly which drive are you using for a boot drive and which drive are you having issues with. There is a known issue with this machine but it is the Hard drive/IR cable. We have been able to fix this issue by going to the 2012 cable (sometimes mods need to be made to the hold down screws,
+https://www.ifixit.com/Store/Mac/MacBook-Pro-15-Inch-Unibody-Mid-2012-Hard-Drive-Cable/IF161-100-1

crwdns2915684:0crwdne2915684:0:

open

crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

I'm a bit confused, exactly which drive are you using for a boot drive and which drive are you having issues with.  There is a known issue with this machine but it is the Hard drive/IR cable.  We have been able to fix this issue by going to the 2012 cable (sometimes mods need to be made to the hold down screws,

crwdns2915684:0crwdne2915684:0:

open