#39 No "Security" information but "Integrity word not set"

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I want to erase my SSD in my Asus EeePC 1000 using directives from https://ata.wiki.kernel.org/index.php/ATA_Secure_Erase
The problem is that hdparm does not report any "Security" information about the drive. Instead, an error is shown:
Integrity word not set (found 0x0000, expected 0xcca5)

I'm attaching the full output of "hdparm -iI /dev/sda"

What would be the best way to do a "Secure Erase" on this drive?

Thanx!

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hdparm -iI /dev/sda