Secure erase mac ssd2/14/2023 ![]() ![]() ![]() There’s only one tricky bit: you have get the drive into “Not Frozen” mode before it will accept the security-erase command. ![]() And one of the commands is security-erase. Turns out, there’s a low-level Linux utility, hdparm, that knows how to send various unusual commands to devices like SSDs. ![]() I assume this is like a microcontroller Flash bank erase - faster and better than a byte-by-byte erase, and puts the memory cells in a reliable state into which data can be written. After looking into it a bit, I ran across the “Secure Erase” command, which appears to do a complete-chip erase and refresh. The smallest and oldest drives fall out the end, to be used for random testing and temporary partition swapping.)Īnyway, some of the drives in my frequently-used machines have been around the block, with multiple formats, wipes, re-installs and so forth, and I wondered whether the SSD wear-leveling was really keeping up. I have upgraded most of my machines to SSDs, but some of the drives have been through several different machines (as I get new, larger drives, I move the old drives to a smaller machine. ![]()
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