Time machine backup 130 GB smaller than hard drive
On my machine (Mid 2012, 10.7.5) Time Machine only backs up 170 GB of 306 GB on the hard drive. This happened for the first time after I needed to reformat the external hard drive (Seagate 1 TB) because it became read only.
I watched the backup process, and at 165 GB Time Machine slowed down to a crawl, then it finalized the backup without copying the last 130 GB or so.
I tried using Super Duper! on the same drive, and was able to copy 290 GB. So there still is some "missing" memory, but nearly as much.
Any ideas of what is going on would be most appreciated.Thanks.