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There maybe be a reset tool for the SSD from the manufacturer, but seeing how it's an Apple OEM specific part from a 3rd party vendor, it's probably going to be unlikely to exist. Unfortunately, for data that's already on the drive, it may be extremely difficult to securely delete it, depending on the SSD used in the MacBook Air. So going forward, if you are concerned with security and you're using SSD, you may want to enable FileVault2 immediately before you start putting data on the SSD. Your best bet going forward is to use encryption and then throw away the encryption key to "securely erase" it. Some drives are known to have better erase tools than others-for instance, drives with Indilinx controllers have a "Sanitary Erase" that deletes all data and restores drives to their out-of-the box condition. But of the twelve drives tested by those researchers, only four of twelve erased their data reliably, and one that claimed to be securely erasing everything was just doing the old "forget where everything is and leave it there for now" trick, and all the data was still retrievable. Many SSDs today also come preinstalled with secure wiping utilities that are meant to actually eradicate data from cells. If that's the kind of security you're looking for, your best bet is encryption, which we will cover in a little bit. Likewise, it is almost impossible to securely delete an individual file on an SSD, because the way that SSDs write and delete files is scattered, and a user has no control over what an SSD is doing where. This can happen because of firmware bugs, and unless you're able to physically confirm that this procedure works on your SSD of choice, it's not reliable enough for a real secure erase. While the research paper noted above that overwriting did obscure all of the data in some of the SSDs they tested, some still had old readable data on them after twenty overwrites.
HOW TO SECURELY ERASE MAC 10.6.8 HARD DRIVE FULL
This is called over-provisioning, and some deletion tools won't give you access to this area (if you can go through the BIOS and uninstall your drive, you can get full access). One is that many SSDs have extra storage space that's not accessible by users.
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The overwriting procedure that works so well for HDDs doesn't work as well for SSDs for a couple of reasons. Hard disk drives have had this problem solved for ages, and can execute a secure delete by filling the space occupied by an incriminating file with zeroes or multiple writes of different characters. Unconfirmed, but it looks like Apple is actively disabling the legacy erase techniques for SSD drives, since they don't work as noted in Ask Ars: How can I securely erase the data from my SSD drive?Īs pointed out in a recent research article, there isn't a standard method for securely deleting data from a solid state drive. It looks like securely erasing an SSD is a different chore than erasing a traditional hard drive. Let me know if that's works, this should securely erase the drive since it will then be encrypted.Īlso, in the future with Lion be sure to use FileVault 2 so that you don't have to worry about this again. Just erased the drive so all space is considered free. Space" and "Security Options" should do the same thing because you Select your level of security and off you go. "Security Options" buttons should no longer be grayed out.
HOW TO SECURELY ERASE MAC 10.6.8 HARD DRIVE FREE
Now select the volume and the "Erase Free Space" and The encryption, it doesn't matter what it is because you won't need Erase the drive using "Mac OSĮxtended (Case-sensitive, Journaled, Encrypted). Restart the computer and hold option to enter the setup screen. Points out a work around to securely erase the SSD drive in the MacBook Air through encryption. Under the erase settings will be a security option when you can write the disk to 0 once or even multiple times. When it loads up, it will give you a few different options, you will need to use the Disk Utility part and highlight your HD and choose the Erase Tab. Once you have done either you can hold down the OPTION key while restarting your computer and booting from it.
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You can also make a USB Bootable Recovery Disk as explained here by Apple:
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If you have a USB Flash Drive of 8 GB of size, you can make a Lion Installer and use it to securely erase the Drive.