Sync lost

Making harmonica read test with nero cd speed test, i get 2 sync lost error. What is this error??

A sync error is an error where the laser loses track when reading the cd. After this error the drive has to synchronize the laser back to the right track.

then my drive is a bad drive?? Are those errors very bad errors??

Could be a media problem as well… could you give us some more information on the brand/type of discs and the drive you are using…?

i tried with vaious brand: tdk (3 errors), verbatim (2 errors), maxell (5 errors)