Mailinglist Archive: opensuse (1786 mails)

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[opensuse] Re: SSD in openSUSE.
  • From: Joachim Schrod <jschrod@xxxxxxx>
  • Date: Thu, 24 Nov 2011 10:44:01 +0100
  • Message-id: <jal3l2$h7h$1@dough.gmane.org>
RĂ¼diger Meier wrote:
On Thursday 24 November 2011, Joachim Schrod wrote:
Greg Freemyer wrote:
Undocumented feature time. First secure erase is not always
implemented on SSDs, so don't trust it.

That's new for me, I haven't found this information via Google.

What kind of google you are using, bing? ;)

http://nakedsecurity.sophos.com/2011/02/20/ssds-prove-difficult-to-securely-erase/
http://www.google.de/search?q=secure+erase+ssd&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
(Haven't read that completely so maybe it's not what you were looking
for.)

No, AFAICS, it isn't.

That report talks about the problem of destroying data on the SSD.

My point was that the command "secure erase" makes the SSD firmware
think the whole disk is unused and it can use every sector for its
internal wear leveling algorithm. For that use case, I don't care
if secure erase really erases all data or not. The only important
result is that the disk is completely usable.

A lot of SSDs have secure erase disabled. (This is called "locked"
by hdparm.) In that post you replied to were the actual steps
needed to unlock an SSD to be able to issue the command.

Joachim

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Joachim Schrod Email: jschrod@xxxxxxx
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