How to encrypt Samsung 840 SSD with Bitlocker

The password has to be set in the BIOS under the ATA-security extension. Usually there's a tab in the BIOS menu titled "Security". Authentication will occur at the BIOS level, so nothing this software "wizard" does has any bearing on setting up the authentication. It's unlikely that a BIOS update will enable HDD password if it wasn't previously supported.

To say that you're setting up the encryption is misleading. The thing is that the drive is ALWAYS encrypting every bit it writes to the chips. The disk controller does this automatically. Setting a HDD password(s) to the drive is what takes your security level from zero to pretty much unbreakable. Only a maliciously-planted hardware keylogger or an NSA-sprung remote BIOS exploit could retrieve the password to authenticate ;-) <-- I guess. I'm not sure what they can do to BIOS yet. The point is it's not totally insurmountable, but depending on how the key is stored on the drive, it's the most secure method of hard drive encryption currently available. That said, it's total overkill. BitLocker is probably sufficient for most consumer security needs.

When it comes to security, I guess the question is: How much do you want?

Hardware-based full disk encryption is several orders of magnitude more secure than software-level full disk encryption like TrueCrypt. It also has the added advantage of not impeding your SSD's performance. The way SSD's stow their bits can sometimes lead to problems with software solutions. Hardware-based FDE is just less messy and more elegant and secure of an option but it hasn't "caught on" even among those who care enough to encrypt their valuable data. It's not tricky to do at all but unfortunately many BIOS's simply don't support the "HDD password" function (NOT to be confused with a simple BIOS password, which can be circumvented by amateurs). I can pretty much guarantee you without even looking in your BIOS that if you haven't found the option yet, your BIOS doesn't support it and you're out of luck. It's a firmware problem and there's nothing you can do to add the feature short of flashing your BIOS with something like hdparm which is something so irresponsible that even I wouldn't attempt it. It's nothing to do with the drive or the included software. This is a motherboard specific problem.

ATA is nothing more than a set of instructions for the BIOS. What you're trying to set is an HDD User and Master password, which will be used to authenticate to the unique key stored securely on the drive. "User" password will allow the drive to be unlocked and boot to proceed as normal. Same thing with "Master". Difference is that a "Master" password is needed to change passwords in the BIOS or erase the encryption key in the drive, which renders all its data inaccessible and irrecoverable instantly. This is called the "Secure Erase" feature. Under the protocol, a 32-bit string of characters is supported, meaning a 32-character password. Of the few laptop manufacturers that support setting an HDD password in the BIOS, most limit characters to 7 or 8. Why every BIOS company doesn't support it is beyond me. Maybe Stallman was right about proprietary BIOS.

The only laptop (pretty much no desktop BIOS supports HDD password) I know will allow you to set a full-length 32-bit HDD User and Master password is a Lenovo ThinkPad T- or W- series. Last I heard some ASUS notebooks have such an option in their BIOS. Dell limits HDD password to a weak 8 characters.

I am much more familiar with the key storage in Intel SSD's than Samsung. Intel was I believe the first to offer on-chip FDE in their drives, the 320 series and on. Although that was AES 128-bit. I haven't looked extensively into how this Samsung series implements key storage, and nobody really knows at this point. Obviously customer service was of no help to you. I get the impression only five or six people in any tech company actually know anything about the hardware they sell. Intel seemed reluctant to cough up the specifics but eventually a company rep answered somewhere in a forum. Keep in mind that for the drive-manufacturers this feature is a total afterthought. They don't know or care anything about it and neither do 99.9% percent of their customers. It's just another advertisement bullet point on the back of the box.

Hope this helps!

The native Self Encrypting Drive function is always on. This means that the data on the ssd is always encrypted, however by default it has no password set. It has an internal hash which is accessed using the BIOS password you give when booting up. The motherboard needs to have HDD BIOS lock option for you to enter the password, which most older desktop motherboards don't have, but most laptops (even older ones) have.

RAID function is problematic, wasn't too long ago when Intel made available TRIM passthrough for RAID 1, and more recently RAID 0. Basically eDrive technology would have to be implemented in Intel drivers too, and this is probably very tricky when going for RAID 0. While I'm not that knowledgeable on the subject, it would appear near impossible as with the current implementation.

Windows software RAID 0 is another possibility, and this enables the hard drives to be in AHCI mode allowing passthrough of edrive commands. However I'm not aware of hardware level bitlocker support in software raid mode. You'll have to try it out. Generally speaking speed difference between this type of "hardware" raid and software is negligible. True server-quality RAID implementations is another matter.

In short, use BIOS HD password (usually named this way despite using UEFI, aka ATA-password) if you wish to use Intel RAID, but you will miss out on eDrive. If you want eDrive, try out software raid which may or may not work.

Also, assuming that there is no clear "HD PASSWORD" type of setting in the UEFI BIOS, and BIOS level HD-passwording is not documented, you may want to try placing a general start-up password and extracting the disk and testing it on another computer or using an external USB-enclosure. It should not boot up nor register in windows if it has a password lock, ie. it appears to be dead. Secure boot function does not affect user passwords, but is rather a communication layer between the hardware and OS and as such does not affect this problem.