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New Mac Pro?

Consult with Lloyd today—


System configuration for CPU, GPU, memory, SSD, backup, RAID, optimizing performance, workflow.
For YOUR optimal workflow

Avoid costly mistakes in throwing money at the problem for less performance and/or buying the wrong machine for your own needs!

Wiping Free Space on Hard Drives and SSDs

Looking for a quick way to wipe free space on any volume?

diglloydTools

The dgl wipeFree command in diglloydTools does so efficiently without any need to erase the drive (a full erase/wipe is always better if the drive is to be sold, but this is not viable when/if the drive is in active and continued use).

At present, the wipeFree command is command-line (Terminal) only. There is also the wipe-files command which erases file and/or folder contents and metadata.

As it turns out, my most frequent use of the wipeFree command is to wipe free space on Disk Utility disk images so that they compress down to the smallest possible size (e.g. when I zip compress one for downloading).

Note that for SSDs, wiping really cannot truly be done in a security sense due to block remapping internal to the drive. In this case, use disktester recondition command (available in GUI) with total writes exceeding the drive capacity by at least 10% does the job, so that the SSD has to “turn over” all its internal blocks.


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