Reconditioning your SSD under OS X

I just noticed that my Crucial SSD were starting to be really slow so I look around to find a way to reconditioning the SSD under OS X. I found that you can do this in two way one free and one that cost a few coins.

A. Using OS X’s Disk Utility and Carbon Copy Cloner or SuperDuper!

B. Using diglloyd’s DiskTester and Carbon Copy Cloner or SuperDuper!

Restoring write performance can be done in about an hour for SSD drives around 128GB.

  1. Start by making a backup of the SSD to another hard drive. The best thing is to create a clone using on of the free programs Carbon Copy Cloner or SuperDuper, and is more or less mandatory if the drive is your boot drive.
  2. Use OS X’s Disk Utility to Erase the SSD. Remember that you will need to boot using the clone if the SSD is your boot drive.
  3. Now you can either (A) write over the entire capacity of the SSD with OS X’s Disk Utility using “Erase free space”, or (B) use the faster approach DiskTester’s recondition command.
  4. If you use DiskTester you can test the speed when done with the Sequential Test option, if the speed is still not what you expect you repeat step 3.
  5. Last you want to erase the SSD with OS X’s Disk Utility again. Finally you clone the backup from step 1 back onto you SSD.

You should do this when you SSD starts to get slow again or regularly run DiskTester’s recondition command to avoid too much defragmentation.

After the process my Crucial SSD drive were:
Write 193MB/sec Read 268MB/sec


Martin Bay | Martin Bay .NET