hdparm --user-master m --security-erase WDCWDCWDCWDCWDCWDCWDCWDCWDCWDCW /dev/sda
hdparm --user-master m --security-erase WDCWDCWDCWDCWDCWDCWDCWDCWDCWDCWD /dev/sda

hdparm --user-master m --security-erase-enhanced NULL /dev/sda
security_password: ""

/dev/sda:
Issuing SECURITY_ERASE command, password="", user=master
SECURITY_ERASE: Input/output error

/dev/sda:

ATA device, with non-removable media
        Model Number:       WDC WD6002FFWX-68TZ4N0
        Serial Number:      XXX
        Firmware Revision:  83.H0A83
        Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0; Revision: ATA8-AST T13 Project D1697 Revision 0b
Standards:
        Used: unknown (minor revision code 0x0029)
        Supported: 9 8 7 6 5
        Likely used: 9
Configuration:
        Logical         max     current
        cylinders       16383   16383
        heads           16      16
        sectors/track   63      63
        --
        CHS current addressable sectors:    16514064
        LBA    user addressable sectors:   268435455
        LBA48  user addressable sectors: 11721045168
        Logical  Sector size:                   512 bytes
        Physical Sector size:                  4096 bytes
        Logical Sector-0 offset:                  0 bytes
        device size with M = 1024*1024:     5723166 MBytes
        device size with M = 1000*1000:     6001175 MBytes (6001 GB)
        cache/buffer size  = unknown
        Form Factor: 3.5 inch
        Nominal Media Rotation Rate: 7200
Capabilities:
        LBA, IORDY(can be disabled)
        Queue depth: 32
        Standby timer values: spec'd by Standard, no device specific minimum
        R/W multiple sector transfer: Max = 16  Current = 0
        Advanced power management level: 254
        DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
             Cycle time: min=120ns recommended=120ns
        PIO: pio0 pio1 pio2 pio3 pio4
             Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
        Enabled Supported:
           *    SMART feature set
           *    Security Mode feature set
           *    Power Management feature set
           *    Write cache
           *    Look-ahead
           *    Host Protected Area feature set
           *    WRITE_BUFFER command
           *    READ_BUFFER command
           *    NOP cmd
           *    DOWNLOAD_MICROCODE
           *    Advanced Power Management feature set
                Power-Up In Standby feature set
           *    SET_FEATURES required to spinup after power up
                SET_MAX security extension
           *    48-bit Address feature set
           *    Device Configuration Overlay feature set
           *    Mandatory FLUSH_CACHE
           *    FLUSH_CACHE_EXT
           *    SMART error logging
           *    SMART self-test
           *    Media Card Pass-Through
           *    General Purpose Logging feature set
           *    WRITE_{DMA|MULTIPLE}_FUA_EXT
           *    64-bit World wide name
           *    URG for READ_STREAM[_DMA]_EXT
           *    URG for WRITE_STREAM[_DMA]_EXT
           *    WRITE_UNCORRECTABLE_EXT command
           *    {READ,WRITE}_DMA_EXT_GPL commands
           *    Segmented DOWNLOAD_MICROCODE
                unknown 119[6]
                unknown 119[7]
           *    Gen1 signaling speed (1.5Gb/s)
           *    Gen2 signaling speed (3.0Gb/s)
           *    Gen3 signaling speed (6.0Gb/s)
           *    Native Command Queueing (NCQ)
           *    Host-initiated interface power management
           *    Phy event counters
           *    NCQ priority information
           *    READ_LOG_DMA_EXT equivalent to READ_LOG_EXT
                Non-Zero buffer offsets in DMA Setup FIS
           *    DMA Setup Auto-Activate optimization
                Device-initiated interface power management
                In-order data delivery
           *    Software settings preservation
                unknown 78[7]
                unknown 78[10]
                unknown 78[11]
           *    SMART Command Transport (SCT) feature set
           *    SCT Write Same (AC2)
           *    SCT Error Recovery Control (AC3)
           *    SCT Features Control (AC4)
           *    SCT Data Tables (AC5)
           *    SANITIZE feature set
           *    OVERWRITE_EXT command
           *    Extended number of user addressable sectors
           *    WRITE BUFFER DMA command
           *    READ BUFFER DMA command
Security:
        Master password revision code = 65534
                supported
                enabled
                locked
        not     frozen
        not     expired: security count
        not     supported: enhanced erase
        Security level high
        640min for SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5000XXXXX
        NAA             : 5
        IEEE OUI        : 000cca
        Unique ID       : 255cxxxxx
Checksum: correct