Smart Response Technology
In computing, Smart Response Technology (SRT) is a proprietary caching mechanism introduced by Intel in their Z68 chipset (for the Sandy Bridge–series processors), which allows a solid-state drive (SSD) to function as cache for a (conventional, magnetic) hard disk drive.
It is implemented entirely in the device driver that ships with the Z68 motherboards. It is available only when the (integrated) disk controller is configured in RAID mode (but not AHCI or IDE modes). Write-back or write-through caching strategy can be selected by the user. The maximum utilizable cache size on the SSD is 64GB. Caching is done at LBA, not file) level.