I have a Samsung Spinpoint HM640JJ as secondary drive in my MacBook (so it is not my boot drive) for about 2.5 years now. In short, it is a 640 gb, 16 mb, 7200 rpm, sata 3 disk.
I have only used up 320Gb of the drive (and 275Gb is still free).
Since a couple of days it has become really slow (e.g. copying to the drive and unzipping to the drive), although access time is still normal.
OSX's disk utility program does not detect any problems and is not able to repair anything. When I do a read/write benchmark with 5Gb files (Black Magic diskspeed test) with a drive temperature of 33 degrees Ceclius, I get the following speeds:
- read: 76.8 MB/s
- write: 69.0 MB/s
That is way too low, is it not? Is this an indication that the drive is dying?
What more can I do to verify the disk's health?