Invalid Disk Label cksum mismatch
Hello.
I'm on a MacBook Air - 2014, which came with Mavericks 10.9.4.
Currently upgraded to Yosemite 10.10.
Question: After upgrading I'm aware that my Recovery Partition disappeared! Also, when trying to use disk utility I get several information, BUT, one in particular (RED) says the following:
Invalid Disk Label @ 119806283776 cksum mismatch
Can anyone tell me exactly what this means? Also, I was using a USB with Mavericks when I used disk utility.
Also, there's a few shortcut that don't work when I boot my Mac: Reste PRAM, Safe Mode and specially Dick Diagnostics, don't work!
Hardware problem or software problem?
Thank you.
MacBook Air, OS X Yosemite (10.10)