The output of the manage-bde -status command shows that the Lock Status is Unlocked for an encrypted drive that is not suspended.  The Windows 8.1 user interface even indicates an unlocked drive.

What does the lock status mean?  How does it differ from suspend status?

Disk volumes that can be protected with
BitLocker Drive Encryption:

Volume C: [OSDisk]
[OS Volume]

    Size:                 118.75 GB
    BitLocker Version:    2.0
    Conversion Status:    Used Space Only Encrypted
    Percentage Encrypted: 100.0%
    Encryption Method:    AES 128
    Protection Status:    Protection On
    Lock Status:          Unlocked
    Identification Field: Unknown
    Key Protectors:
        TPM
        Numerical Password

Volume D: [FAST2]
[Data Volume]

    Size:                 476.81 GB
    BitLocker Version:    2.0
    Conversion Status:    Fully Encrypted
    Percentage Encrypted: 100.0%
    Encryption Method:    AES 128
    Protection Status:    Protection On
    Lock Status:          Unlocked
    Identification Field: Unknown
    Automatic Unlock:     Enabled
    Key Protectors:
        External Key
        External Key (Required for automatic unlock)
        Numerical Password

Hi,

This is by default.

It meas protected data with a recovery password or a recovery key.

Manage-bde: pause means pauses encryption or decryption.