hdparm --user-master u --security-unlock ./perspective /dev/sdc
........................................
  security_password: "./perspective"

/dev/sdc:
 Issuing SECURITY_UNLOCK command, password="./perspective", user=user
SECURITY_UNLOCK: Input/output error

hdparm --user-master u --security-unlock $(printf 'x34x35x19x12x13x1Fx19x12x2Ex14x17x2Fx12') /dev/sdc
........................................
security_password: "45./"

/dev/sdc:
 Issuing SECURITY_UNLOCK command, password="45./", user=user
SECURITY_UNLOCK: Input/output error

/dev/sdc:

ATA device, with non-removable media
    Model Number:       ADATA SP900
    Serial Number:      2D3020001288
    Firmware Revision:  5.0.7a
    Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
    Used: unknown (minor revision code 0x0110)
    Supported: 8 7 6 5
    Likely used: 8
Configuration:
    Logical     max current
    cylinders   16383   16383
    heads       16  16
    sectors/track   63  63
    --
    CHS current addressable sectors:   16514064
    LBA    user addressable sectors:  250069680
    LBA48  user addressable sectors:  250069680
    Logical  Sector size:                   512 bytes
    Physical Sector size:                   512 bytes
    Logical Sector-0 offset:                  0 bytes
    device size with M = 1024*1024:      122104 MBytes
    device size with M = 1000*1000:      128035 MBytes (128 GB)
    cache/buffer size  = unknown
    Nominal Media Rotation Rate: Solid State Device
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 = 16
    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
       *    48-bit Address feature set
       *    Mandatory FLUSH_CACHE
       *    FLUSH_CACHE_EXT
       *    SMART error logging
       *    SMART self-test
       *    General Purpose Logging feature set
       *    WRITE_{DMA|MULTIPLE}_FUA_EXT
       *    64-bit World wide name
       *    IDLE_IMMEDIATE with UNLOAD
            Write-Read-Verify feature set
       *    {READ,WRITE}_DMA_EXT_GPL commands
       *    Segmented DOWNLOAD_MICROCODE
       *    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
       *    Device automatic Partial to Slumber transitions
       *    READ_LOG_DMA_EXT equivalent to READ_LOG_EXT
            DMA Setup Auto-Activate optimization
            Device-initiated interface power management
       *    Software settings preservation
       *    SMART Command Transport (SCT) feature set
       *    SCT Data Tables (AC5)
       *    SET MAX SETPASSWORD/UNLOCK DMA commands
       *    Data Set Management TRIM supported (limit 1 block)
       *    Deterministic read data after TRIM
Security:
    Master password revision code = 22616
        supported
        enabled
        locked
    not frozen
    not expired: security count
    not supported: enhanced erase
    Security level high
    2min for SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 0000000000000000
    NAA     : 0
    IEEE OUI    : 000000
    Unique ID   : 000000000
Checksum: correct