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Product Features
the device lock function is enabled and the user password has been forgotten. When the Security Erase
Unit command is used to unlock the drive, all user data is erased.
3.20 Optional Model: Self Encrypting Drive (SED)
This product platform has an optional model available that provides Full Disk Encryption (FDE)
utilizing a Hardware AES encryption engine. The encryption capability for this model can be accessed
via the Security Mode's Secure Erase Unit bit and/or the Sanitize command.
3.20.1 Security Mode FDE
The Security Erase Unit FDE encrypts all the user data before it is written to the media. When the user
wishes to render the data unreadable, the user issues a SECURITY ERASE UNIT command. This
command has two levels: high and maximum. In the high mode, the device writes zeroes over all the
user data on the media. This operation can take hours or days depending on the size of the media and
leaves a known pattern of data on the media. In the maximum mode, the device replaces the encryption
key with a new one. This operation is measured in milliseconds and leaves random data that does not
resemble the original data on the media.
3.20.2 Sanitize Device Feature Set
The Sanitize Device feature set provides two methods to erase data on the hard drive. Once erasure
starts it continues even if power is removed from the hard drive and then reapplied.
The first mode is designed for speed and completes in a few milliseconds. In this mode, all the user data
on the media is encrypted. The erasure occurs by replacing the encryption key rendering the data
unreadable.
The second mode is designed for complete obliteration. In this mode, a pattern is written over all the
sectors that store user data. The time for this method to complete ranges from hours to days depending
on the number and type of data pattern overwrites.
3.21 Data Path Protection (DPP)
DPP prevents possible electronic failures from corrupting data on the hard drive. Although typically a
very rare occurrence, there is the possibility of intermittent failures within the hard drive due to the
electronics or connections on the printed circuit board inducing corruption of the data as it moves
from the interface to the media. By incorporating DPP in our hard drives, WD protects customer data
with the ability to detect these type of rare events, and prevents incorrect data from being written to the
media.
3.22 Manufacturing Option Block
The 8-pin jumper block is for factory use only. Placing a jumper on the pins does not enable any
features or affect drive setup or performance. Do not place a jumper on these pins.
Figure 3-2. Manufacturing Option Block
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8-pin Manufacturing Option Block
RELEASED 8/13/13
EX800M
2679-771339-A05
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