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2 Momentus 5400 FDE.4 SATA Product Manual, Rev. C

1.2 About Momentus 5400 FDE.4 SATA disk drives

The Momentus 5400 FDE.4 SATA drives contain DriveTrust technology providing Full Disk Encryption (FDE)

using proven Advanced Encryption Standard (AES) data encryption and decryption.

You can elect to use Momentus 5400 FDE.4 SATA drives in one of two different security modes:

1. ATA Security mode (available on all models documented in this manual)

To operate in ATA Security mode, you only need a host system and operating system that supports the

existing ATA Security Command Set. The drive is shipped to operating in this mode, ready to use. All

models documented in this manual may operate in this mode.

2. DriveTrust Security mode

To enable a robust enterprise-level security and management policy, you may elect to operate in DriveTrust

Security mode. To do so, you will need to use a third-party security application to manage the DriveTrust

features. Please contact your system or software provider for more details.

Refer to the table below to determine which mode is best for your particular solution.

FDE drive feature list

• Automatically encrypts (and decrypts) all data on the drive

• Operations are performed with no measurable performance loss

• All user data is encrypted on write operations and decrypted on read operations

FDE benefits

• Drive-level protection of data

• Drives that are stolen, taken out of service, or re-purposed remain fully protected

• Near instantaneous disposal and re-purposing of the drive (ensures that data from previous user is not

accessible by the new drive owner)

• Able to be deployed within a trusted computing environment

The drive encrypts every write operation and decrypts every read operation without user intervention. The

encryption and decryption is done on the drive itself, so there is a near-zero performance impact when the

drive writes and reads data. The performance-optimized encryption and decryption engine performs at the

SATA interface speed.

The purpose of full disk encryption on the drive is to protect the data stored on the drive in the event that the

host system is lost or stolen. This data at rest protection assures the system owner that if their system is lost or

stolen, their data will not be accessible without the correct credentials.

Note. The system reauthenticates the user on powerup and when awakening from sleep mode. It is not

necessary to power down to ensure that the system reauthenticates the user.

Table 1: Security feature matrix

ATA Security mode DriveTrust mode

Feature

Non-FDE drive

without ATA Security

enabled

Non-FDE drive with

ATA Security enabled

FDE drive with ATA

Security enabled

FDE drive operating in

DriveTrust mode via

third-party software

Password required to unlock No Yes Yes Yes

Full Disk Encryption No No Yes Yes

At speed encryption No No Yes Yes

Passwords stored securely No Yes Yes Yes

Quick erase No No Yes Yes

Preboot authentication No No No Yes

Master/User passwords No No No Yes

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 59 60

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Acer Power 5400 Manuel Page 8

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