

Now I try to do a Restore From Time Machine backup and its no longer able to find my Yosemite boot drive! I try selecting "Startup Disk" which doesn't find any startup disks. Then I rebooted, hoping to simply boot back into Yosemite but it continues to boot to OS X Utilities no matter what I do. Then I attempted to begin a reinstall OS X but that only sees the "Recovery HD", it doesn't see my main disk partition so I can't install. I did verify and repair on the Macintosh HD which did not report any errors. So I tried to use the disk utility to erase the disk but the erase button was disabled.
It began to restore and then said it couldn't continue because of some sort of unspecified error. I selected Restore from Time Machine backup and followed the steps including unlocking the FileVault. This was unacceptable and I was unable to determine the cause so I decided to revert to Mavericks using my Time Machine backups, so I rebooted using cmd R. I recently upgraded to Yosemite which seemed to work well at first, but I found that it kept freezing up after an hour or two. Here is my situation: I have an MBP Retina 2013 with an SSD drive which I ran with Mavericks with no problems for about almost a year now.
