hdparm -I /dev/sda

/dev/sda:

ATA device, with non-removable media
        Model Number:       Samsung SSD 840 Series                  
        Serial Number:      S14CNEAD113907H     
        Firmware Revision:  DXT07B0Q
        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 0x0039) 
        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:  234441648
        LBA48  user addressable sectors:  234441648
        Logical  Sector size:                   512 bytes
        Physical Sector size:                   512 bytes
        Logical Sector-0 offset:                  0 bytes
        device size with M = 1024*1024:      114473 MBytes
        device size with M = 1000*1000:      120034 MBytes (120 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
        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                                                                                                                                                                                                                                             
                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                                                                                                                                                                                                                                                
           *    General Purpose Logging feature set                                                                                                                                                                                                                            
           *    WRITE_{DMA|MULTIPLE}_FUA_EXT                                                                                                                                                                                                                                   
           *    64-bit World wide name                                                                                                                                                                                                                                         
                Write-Read-Verify feature set                                                                                                                                                                                                                                  
           *    WRITE_UNCORRECTABLE_EXT command                                                                                                                                                                                                                                
           *    {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)                                                                                                                                                                                                                                  
           *    Phy event counters                                                                                                                                                                                                                                             
           *    unknown 76[15]                                                                                                                                                                                                                                                 
           *    DMA Setup Auto-Activate optimization                                                                                                                                                                                                                           
                Device-initiated interface power management                                                                                                                                                                                                                    
                Asynchronous notification (eg. media change)                                                                                                                                                                                                                   
           *    Software settings preservation                                                                                                                                                                                                                                 
                unknown 78[8]                                                                                                                                                                                                                                                  
           *    SMART Command Transport (SCT) feature set                                                                                                                                                                                                                      
           *    SCT Write Same (AC2)
           *    SCT Error Recovery Control (AC3)
           *    SCT Features Control (AC4)
           *    SCT Data Tables (AC5)
           *    reserved 69[4]
           *    SET MAX SETPASSWORD/UNLOCK DMA commands
           *    WRITE BUFFER DMA command
           *    READ BUFFER DMA command
           *    Data Set Management TRIM supported (limit 8 blocks)
           *    Deterministic read ZEROs after TRIM
Security: 
        Master password revision code = 65534
                supported
        not     enabled
        not     locked
                frozen
        not     expired: security count
                supported: enhanced erase
        2min for SECURITY ERASE UNIT. 2min for ENHANCED SECURITY ERASE UNIT. 
Logical Unit WWN Device Identifier: 500253855016ce48
        NAA             : 5
        IEEE OUI        : 002538
        Unique ID       : 55016ce48
Checksum: correct