Ultrabay speed: 1,5Gb/s or 3Gb/s?

Question

The latest psref does not state categorically that the SATA Ultrabay Hard Drive adapter supports 3.0 Gb/s. Does it or are 3.0 Gb/s drives in the Ultrabay throttled down to 1,5Gb/s?

Answer 1

Judging by the output of this command (in Linux), it seems the Ultrabay Adapter III in my T400s is running at  3Gb/s:
$ sudo hdparm -I /dev/sdb
/dev/sdb:
ATA device, with non-removable media
    Model Number:       INTEL SSDSA2M160G2GC                    
    Serial Number:      CVPO9423003Z160AGN  
    Firmware Revision:  2CV102HD
    Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6
Standards:
    Used: ATA/ATAPI-7 T13 1532D revision 1
    Supported: 7 6 5 4
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:  312581808
    Logical  Sector size:                   512 bytes
    Physical Sector size:                   512 bytes
    device size with M = 1024*1024:      152627 MBytes
    device size with M = 1000*1000:      160041 MBytes (160 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
       *    IDLE_IMMEDIATE with UNLOAD
       *    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)
       *    Native Command Queueing (NCQ)
       *    Phy event counters
            Device-initiated interface power management
       *    Software settings preservation
       *    Data Set Management determinate TRIM supported
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: 50015179590b8c08
    NAA        : 5
    IEEE OUI    : 001517
    Unique ID    : 9590b8c08