MBP can't access SSD when internal. Works via USB adapter
Installing a Crucial mx100 SSD into a 2010 Macbook Pro.
I installed MX100 on an external usb adapter, formatted it and restored an apple backup onto it.
If I boot onto that drive connected via the usb adapter everything works well.
If I then install that drive internally, and reboot, the ssd drive can not be seen and I get the question mark folder.
The guides here and elsewhere suggest the internal sata cable is suspect, so I bought one of those and installed it and the problem is the same.
I also have a second MBP that I installed this drive into internally and the problem is the same.
I updated the mx100 firmware to the latest and the problem is the same.
I spoke with Crucial support and they blame the sata cable, but I have already tried 3 of those.
Any suggestions on how to proceed? Try a 4th cable? How do I tell a good cable from a bad one? Or do I follow the pack and just try a different ssd?
Your help is appreciated
Update: The problem was my mistake. The SSD was formatted with the windows format which worked via the usb cable, but not when installed internally. I reformatted the SSD using the Mac GUID format and it now works properly.
The cables were fine.