hybrid drive

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hybrid drive

(1) An optical disc drive that supports more than one format. See Blu-ray.

(2) A storage drive with a small amount of solid state flash memory (SSD) and a large amount of hard disk. See solid state hybrid drive and Fusion Drive.

(3) A hard drive with a disk cache made of flash memory. If the next set of data called for by the computer is in the cache, the transfer is much faster than reading from the disk. The capacity of the flash cache is a small percentage of the drive's total space.

RAM Caches: DRAM and SRAM
Since the 1990s, hard drives have had a small dynamic RAM (DRAM) cache built in or on the controller. Because DRAM is faster than flash memory, hybrid drives generally use both DRAM and flash memory caches, and they may use static RAM (SRAM) instead of DRAM because SRAM is even faster. See cache, flash memory, SSD, dynamic RAM, static RAM, Robson cache and NV cache.
References in periodicals archive ?
Storage comes courtesy of a 508GB hybrid HDD - you get 500GB of HDD
The hybrid HDD leverages the benefits of ample data storage capacity with high-speed processing and quick OS startup that flash memory enables.
The U840 uses a standard processor but the hybrid HDD makes it slower than SSD Ultrabooks.
Equipped with the latest high-performance Intel Core i7-4900MQ vPro Processor and cutting-edge NVIDIA Kepler generation Quadro graphics, in addition to a hybrid HDD for high-speed booting and fast processing, the CELSIUS H730 enables an even higher performance work environment.
Higher performance with the latest CPU, graphics accelerator and hybrid HDD
The new UltrabookO also boasts enhanced levels of computing performance, with on-board features such as the latest 4th-Generation Intel(R) Core(TM) i5-4200U Processor, as well as a 500GB hybrid HDD that enables quick startup for the OS as well as ample storage capacity for data.