What Is Intel’s Smart Response Technology?
Solid state drives offer extremely fast data access and load times, but they typically provide less overall storage and come with a higher price tag than hard disk drives. By combining the two technologies, SRT enables the Intel processor to access data in the fastest, most efficient way possible. Enterprise-class servers have long used solid state drives as a form of cache between the server and their hard drive arrays to boost performance without the extremely high cost of a full SSD array. Intel introduced this same technology to many of its personal computers several years ago with the Z68 chipset in the form of SRT.
What You Need to Use Intel SRT
Using the Smart Response Technology with the compatible Intel-based computers requires the following:
A hard disk drive A SATA solid state drive The Intel Rapid Storage Manager program The Intel Rapid Storage Technology driver for your operating system
Before you set up SRT, you should format your solid state drive using the NTFS file system. The BIOS setting for the hard drive controller must also be set to RAID mode rather than ACHI mode. Consult your motherboard documentation for how to access the BIOS to make the change.
How to Set Up Intel Smart Response Technology
When you launch the Rapid Storage Technology program, select the Accelerate tab, then select Enable acceleration. It will then ask you how much of the SSD (up to 64GB) you want to use for the cache. Choose your hard drive under Select the disk or volume to accelerate, choose an acceleration mode, then select OK.
SRT Acceleration Modes: Enhanced vs. Maximized
Under Select an acceleration mode, you can choose between Enhanced or Maximized. This will affect the performance of the cache via how it writes data to the drives:
Enhanced mode uses a method called write-through. When data is written to the drive, it is written to both the cache and the hard drive at the same time. This keeps the performance for writes to the slowest writing device, which typically is the hard drive.Maximized mode uses a system called write-back. When data is written to the system, it is written to the faster cache first and then backfilled to the slower hard drive. This gives the fastest write performance possible, but it also has one big drawback: In the event of a power failure or crash, it is possible that data will be corrupted on the hard drive if it has not been fully written. As a result, this mode is not recommended for any form of critical data system.
Intel SRT Performance Test
In order to see how effective Smart Response Technology is, we set up a test system with the following hardware:
Motherboard: ASRock Z68 Pro3Processor: Intel Core i5-2500k (default speeds)Memory: 8GB (2x4GB) G.SKILL Ripjaws DDR3 1600MHzHard Drives: Two WD Caviar SE16 640GB SATA in RAID 0Solid State Drive: OCZ Agility 3 60GB SATA III
The big difference in this setup compared to what many will use is the RAID 0 setup. The Smart Response Technology can work with a single hard drive or a RAID array. RAID arrays are designed for improved performance. We wanted to see if SRT will give a performance boost to a system that is already using an existing technology to accelerate performance. To test this, we recorded the following CrystalMark benchmark data for just the RAID array:
Intel SRT Performance Test
To take it a step further, we timed a few different tasks on the system over multiple passes to see how the caching improved their performance. We decided to look at four different tasks to see how the cache affected the system. First, we did a cold boot to the Windows 7 login screen minus the hardware POST time. Second, we tested the Unigine graphics software from launch until the benchmark started. Third, we tested out loading a saved game from Fallout 3 from the load screen to being able to play. Finally, we tested opening 30 photos simultaneously in Photoshop Elements. Below are the results:
Intel SRT vs. Using a Dedicated SSD: Which is Better?
Intel’s Smart Response Technology is most useful for people with existing systems that wish to boost their computer’s speed without the hassle of rebuilding their operating system or doing a clone process to move data from a hard drive to an SSD. Instead, they can purchase a small SSD and drop it into an existing Intel system that supports Smart Response Technology. For those building a new system, it is still more beneficial to use a good sized SSD as a primary drive and then a large HDD as a secondary drive.
