I would like to securely erase the hard drive of a SSD in a MacBook Pro. The Disk Utility does not give me the option to wipe this drive even when I boot into the System Partition. (it is greyed out).
When I called Apple Tech support they said
"Secure erase is likely disabled because it will cause undue wear on the hard drive, and reduce its life"
I did notice that I am able to wipe the drive using terminal
diskutil and had the following options:
Note: Level 2,3, or 4 secure erases can take an extremely long time. 0 - Single-pass zeros 1 - Single-pass random numbers. 2 - US DoD 7 pass secure erase 3 - Gutmann algorithm 35 pass secure erase 4 - US DoE 3-pass secure erase.
What level of secure erase is sufficient when deploying the machine internally? ... or for sale on EBay?
How much of the hard drives' lifespan is reduced when using each of the wipe options?