■ Boost your original system HDD read speed without reinstalling OS

■ Minimum SSD data write times help extend SSD life-cycle

■ Easy to install

■ Compatible with most of 2.5” SATA SSD


Initial production run of HDDBOOST (serial number AC09520711 to AC09521708) has USB pin header and cable included for firmware upgrade, but subsequent product runs of HDDBOOST no longer have them. All HDDBOOST (including ones from the initial product run) can be firmware updated via SATA connector so USB connectors are no longer necessary.

SilverStone strongly recommends updating firmware in advance of product installation. If your HDDBOOST is from the initial product run (serial number AC09520711 to AC09521708), please update the firmware at your earliest convenience for enhanced compatibility with latest SSD.



Enclosure material 1.0 mm SPCC with Nickel Plating
Color Nickel
Power requirement +5V in from PC power supply
Interface SATA 3Gbps
SDD Support 2.5" SATA interface
Application 3.5” Internal hard drive bay
HDD interface support 3.5” Internal hard drive bay
Controller Board Dimension 98.6mm x 24.5mm x 1.6mm
Enclosure interface 1 x 7 pin SATA connector to motherboard.
1 x 7 +15 pin SATA + Power connector to system hard drive and power.
1 x USB connector (For firmware upgrade only)
Operating system support Any OS with SATA interface support
Net weight 160g±10g
Dimension 130.5mm(W) x 101.6mm(D) x 25.4mm(H)
5.14" (W) x 4" (D) x 1" (H)


  • Q&A
  1. Improve synchronize speed.
  2. Fine tuning SSD compatibility.
  3. Limit firmware upgrade while storage synchronizing.
  1. Fixed disappear SST_HDDBOOST in some of Motherboard BIOS re-scan S.M.A.R.T device.
Note:   Support S.M.A.R.T. function command transfer to hard drive.
Note:   add start read data from HDD when SSD fail.
Note:   add SPI flash write command test before firmware write to flash.

Describe Ver Size Download
HDDBOOST High resolution photos 687 KB
HDDBOOST Firmware 100127.1(2010/03/12) 512 KB
HDDBOOST Firmware 100416.1(2010/04/26) 512 KB
HDDBOOST Firmware 100715.v1_Beta(2010/07/20) 512 KB
HDDBOOST Firmware 20110425v1(2011/05/06) 512 KB
HDDBOOST Firmware upgrade guide v1.1 128 KB
HDDBOOST Utility 1.13Beta4 372 KB
HDDBOOST Manual v1.1 2,730 KB

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HDDBOOST will carry out the action of mirror backup right after the initial installation. This action will copy the front-end data of the original system hard drive to the SSD sequentially (assuming that the capacity of SSD is smaller than HDD.).

After the initial mirroring of data is completed, SSD and HDD will have the same front -end data. HDDBOOST’s controller chip will then set data read priority to SSD to take advantage of SSD’s much faster read speed. HDDBOOST’s priority will be determined by the following rules:

1.When data is present on both drives, read from SSD.
2.When data is not present on both drives, read from HDD.
3.Data will only be written to HDD.

Every time the system starts, HDDBOOST will initiate mirror backup automatically to ensure front-end data between the two drives are the same.
In general use, the data will be fully written to the hard drive, so no data would be lost. The Mirror backup process will not write data to the hard drive, thus eliminating the chance of data loss. Even if SSD wears out or HDDBOOST’s controller malfunctions, the original hard drive can still be used to boot the system normally.
In normal operating system environment, a system drive gets written onto constantly until the system is turned off. Compared to using SSD only as the main system drive, HDDBOOST will only write to SSD once sequentially during system boot up when it activates mirror backup. This significantly reduces the wear and tear that normally occurs when writing data to SSD.
During the first Mirror backup process, HDDBOOST will “Mirror” the front-end data from HDD to SSD directly. Defragmenting the HDD first will ensure there is as much data as possible to be copied to SSD.
After extended usage without rebooting, more and more data may no longer be mirrored on SSD to take advantage of its performance so re-booting the system on regular basis can ensure the performance is always maintained at a high level.
The recommended capacity of SSD will depend on the number of installed programs and the size of the operating system. Generally, Windows XP needs 8GB minimum while Windows Vista/7 needs 32GB minimum.
1. Plug the included SATA/power cable to the HDDBOOST and to corresponding connectors on the motherboard, power supply and system hard disk. Turn on the computer, the system will scan and install the driver automatically. After the above installation is completed, turn off your computer.
2. Connect your SSD carefully to the connector on the HDDBOOST. Turn on the system, enable the HDDBOOST as your boot hard disk drive and enjoy the powerful speed.
The HDDBOOST does not support S.M.A.R.T (Self-Monitoring, Analysis, and Reporting Technology). If you connect the HDDBOOST and S.M.A.R.T status error, it does not mean mechanical problem of HDDBOOST.
According the specification, the HDDBOOST can not backup data between the hard disk and the SSD. We suggest that user should backup important data manually in a regular time.
Yes, if you want to build a new computer system with HDDBOOST then you can install OS into HDDBOOST directly
Some benchmark software test with temporary files so SSD is not tested with these types of software. They read data from system hard drive only as a result of testing with temporary files. We recommend users to test HDDBOOST with professional software tools such as HD Tune Pro or HD Tach.
The original intention of including the USB connector to HDDBOOST was for firmware updates. However, further testing showed that firmware can be updated via SATA connection as well so USB is no longer needed. USB cable was only included with HDDBOOST batch with serial numbers from AC09520711 to AC09521708.
Software monitoring of HDDBOOST synchronization is only supported for Windows operating system via “HDDBOOST Utility.” To monitor synchronization status for other x86 computers running other types of operating systems such as Linux, it is necessary to look at status LEDs on the HDDBOOST. If synchronization is still in progress, both status LEDs on the HDDBOOST will flash rabidly at the same time. Once synchronization is finished, the LEDs will either flash independently or stop flashing.
Yes you can, you will need to use one HDDBOOST for each HDD and SSD combination in the RAID. On some motherboards, you may have trouble booting up using RAID with HDDBOOST installed. In this case, please go into your motherboard BIOS and change AHCI mode to IDE mode for better compatibility.