Some users are reporting this problem when installing the new OS X Yosemite 10.10 operating system and from what we can tell it is not generalized but there are several users with the same problem. On the Apple support page there is already a Discussion Forum with some users reporting the bug and possible solutions to it.
Apparently this error is directly related to hard drive or RAM of our team and can be a headache for newcomers to Yosemite. The recommendations may or may not work but some users have managed to fix this "File system verify or repair failed" error by taking a few steps.
Backup
The first thing and this we do not tire of repeating it on all occasions is that if you can make a backup Before carrying out any of the options that we show you to avoid losing important data on your Mac. The first thing is to try to carry out a repair of the hard disk to check if it is corrupt or has failures and repair it. Many users of the Apple forum indicate how a possible cause of this error not having performed a disk repair before installing OS X Yosemite.
RAM
If our album is ok we can go to check the RAM of our Mac as some users report a failure in a RAM slot. The problem is that at some point RAM was changed or added and this fails with the new OS X Yosemite, to check it you we recommend Memtest and if once this has passed it does not throw an error, we go to the next point.
Formatting the Disk
If none of the above options solve the problem, we can only resort to hard drive formatting to try to fix it. To do this we have to reinstall OS X Mavericks and perform a check on all the above to retry the installation of OS X 10.10 Yosemite.
It would be interesting that You will tell us about your experience with this error if you have suffered it and you will leave your solution in the comments to help others who may be affected by the "File system verify or repair failed" error. Personally I have not had this problem when installing Yosemite but it is true that some of you warned us to have this problem.
Are you having problems or bugs with OS X Yosemite?