In computing, Smart Response Technology (SRT) (pre-launch name SSD Caching) is a proprietary caching mechanism introduced in 2011 by Intel for their Z68 chipset (for theSandy Bridge–series processors), which allows a SATA solid-state drive (SSD) to function as cache for a (conventional, magnetic) hard disk drive.
SRT is managed by Intel Rapid Storage Technology software version 10.5 or later, and implemented in its device driver and the Z68 motherboard's firmware (option ROM). It is available only when the (integrated) disk controller is configured in RAID mode (but not AHCI or IDE modes) by implementing a style of RAID-0 striping. Write-back (Maximized mode) or write-through (Enhanced mode) caching strategy can be selected by the user. The maximum utilizable cache size on the SSD is 64 GB. Caching is done at the logical block addressing (LBA) level, not the file level.
Shortly before the announcement of the new chipset, Intel also introduced the Intel 311 (Larson Creek), a 20 GB single-level cell (SLC) solid-state drive, which it markets as suitable for caching. TRIM garbage collection is currently not supported for SRT caching devices, so the SSD's performance is solely maintained by its own firmware.
Maximized Mode vs Enhanced Mode
The tow different modes set up the SSD caching in different ways. Enhanced mode is designed for maximum security, reducing the possibility of data loss but also limiting write speed as it writes data to the SSD and HDD at the same time. Maximized mode is designed for optimum performance, writing data to the SSD and only periodically transferring it to the hard drive. This means that if anything should go wrong with the SSD, you could lose some data. The outcome of an SSD failure would depend largely on what the SSD was caching at the time of failure, so it's difficult to predict how it would affect your system.
資料來源: http://en.wikipedia.org/wiki/Smart_Response_Technology
http://www.hardwaresecrets.com/printpage/Intel-Smart-Response-Technology-Explained/1292
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