Small Computer Standard Interface: A set of standards for physically connecting and transferring data between computers and peripheral devices. The SCSI standards define commands, protocols, and electrical and optical interfaces. SCSI is most commonly used for hard disks and tape drives, but it can connect a wide range of other devices, including scanners and CD drives.

Intel Turbo Memory (ITM) is an integrated nonvolatile (NV) caching solution. ITM works together with Microsoft RAID, and it introduces support for caching of a RAID device. This NV caching solution requires that NV cache commands be sent to the RAID device.

In Windows Vista, the NV cache commands can be sent only to HDC-class devices. However, many RAID products are Small Computer Standard Interface (SCSI)-class devices. Therefore, the NV cache commands cannot be sent to these devices.

An update is available to let NV cache commands be sent to SCSI-class devices.