[Bglug] Secure erase of an SSD different from HD
rashkae at tigershaunt.com
Wed Dec 30 23:39:31 EST 2015
On 15-12-30 10:56 PM, Andrew Howlett wrote:
> i paid $9 for the partition magic iso mentioned in the article. partition magic is a linux distro, fits on a 1G USB stick.
For those who would rather use all kind of arcane commands to do it
(Note: risky commands, use at own risk.)
hdparm --security-set-pass NULL /dev/sd?
hdparm --security-erase NULL /dev/sd?
hdparm --security-disable NULL /dev/sd?
Some BIOSs will pre-emptively disable the security features. (This
prevents malware from locking your drive with an unknown password,
bricking it.) The easiest way I found around this is to boot the Linux
environment, then hotplug the SDD you want to blank.
New versions of linux-util suite include a command to trim the entire
device: The command is called *blkdiscard*. This is a good to restore
the performance of an SSD when re-using the drive, and should
effectively do the same thing. *However.* The standard does not
require the drive to return null bytes from those sectors before they
are re-used. I think most drives will do so, but blkdiscard should
probably not be used instead of a proper secure-erase.
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