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May i secure erase my SSD using this guide? - Page 2

post #11 of 14
Quote:
Originally Posted by Unit Igor View Post

I didn't read guide from rwlabs,but i know that Sean Guide is good.
http://www.youtube.com/watch?v=udxNL6sCuDQ
Secure Erase with Parted Magic or software from SSD manufacturers dont write zeros,in fact it doesn't write anything.

That's what the rwlabs guide said anyway.
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post #12 of 14
Quote:
Originally Posted by Algorithm View Post

That's what the rwlabs guide said anyway.

No, the RWLabs guide did not say it writes zeros to the entire SSD.

The full text is this: "SelectInternal: Secure Erase command writes zeroes to entire data area” it is VERY important that you select this command. Click Continue".

OTOH, I can see why you would think so, because the selection of this option clearly states "writes zeroes...". I must say the guide does not make the following clear: (The guide did not say it does not write zeros to a SSD.)

That selection issues a SATA standard Secure Erase command to the target drive. If that drive is a HDD, zeros will be written to it. If the target drive is a SSD, this command will trigger a SSD secure erase (resetting all the NAND to its neutral state). It all depends on the drive's firmware, as how it responds to this command.

Also, "zeroing out" a SSD is not a good thing to do to it at all. That would write to almost every bit of storage space on the SSD. When you started to use the SSD after that, anytime you saved/wrote anything to it, the NAND needed to store it must be erased first. That takes time, and slows down performance.
post #13 of 14
Quote:
Originally Posted by parsec View Post

No, the RWLabs guide did not say it writes zeros to the entire SSD.

I meant that RWLabs said the same thing as what Unit Igor said.

I probably shouldn't have used the word "always" though. I should have said "too" smile.gif

So basically, the "Secure Erase" doesn't use the address access circuitry, it uses a different set of circuitry that is designed only for wiping the drive.
Edited by Algorithm - 12/2/13 at 8:58am
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post #14 of 14
Quote:
Originally Posted by Algorithm View Post

I meant that RWLabs said the same thing as what Unit Igor said.

I probably shouldn't have used the word "always" though. I should have said "too" smile.gif

So basically, the "Secure Erase" doesn't use the address access circuitry, it uses a different set of circuitry that is designed only for wiping the drive.

No problem, and as I said earlier, the way that guide was written does not make clear what happens after selecting that option when used with SSDs, IMO. The description of that option should be updated, since it does not cause zeros to be written to a SSD.

It all depends upon what the drive's firmware does when it receives a secure erase command. You are basically correct that SSDs have a special function that sets all its NAND storage to an empty/ready to be written to state. Writing anything to NAND storage causes whatever bytes used to be no longer empty.
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