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A hybrid array is a form of hierarchical storage management that combines hard disk drives (HDDs) with solid-state drives (SSDs) for I/O speed improvements. Hybrid storage arrays aim to mitigate the ever increasing price-performance gap between HDDs and DRAM by adding a non-volatile flash level to the memory hierarchy. Hybrid arrays thus aim to lower the cost per I/O, as a more cost-effective solution than using only SSDs for storage. Hybrid architectures can be as simple as involving a single SSD cache for desktop or laptop computers, or can be more complex as configurations for enterprise storage and cloud computing. == Implementations == Numerous manufacturers offer hardware and software solutions for building hybrid arrays, including: * Adaptec's High-performance Hybrid Arrays (HPHA) for enterprise storage, e.g. the MaxIQ series * Apple's Fusion Drive * bcache, dm-cache, and Flashcache/EnhanceIO on Linux * Condusive's ExpressCache mostly used on laptops * EMC VFcache * Various Fusion-io products, e.g. ioTurbine〔(【引用サイトリンク】accessdate=2015-03-26 )〕 and the product line it acquired by buying NexGen 〔(【引用サイトリンク】title=Fusion-io buys NexGen )〕 * Hitachi Accelerated Flash Storage (HAFS) used together with the Hitachi Dynamic Tiering software * IBM Flash Cache Storage Accelerator (FCSA) server software * Intel's Smart Response Technology for desktop * Intel's Cache Acceleration Software for servers and workstations * LSI CacheCade software for their controllers〔(【引用サイトリンク】title=LSI MegaRAID CacheCade Pro 2.0 Review )〕 * Marvell's HyperDuo controllers * Microsoft's Automated Tiering (since Windows 2012 R2) * NetApp's Flash Cache, Flash Pool, Flash Accel〔(【引用サイトリンク】title=NetApp: Flash as a STORAGE tier? You must be joking )〕 * Oracle/Exadata Smart Cache Flash * Oracle FS1 Flash Storage System * Microsoft' ReadyBoost, useful for low-end personal computers using USB flash drives as cache * Nvelo DataPlex SSD caching software (acquired by Samsung) * SanDisk FlashSoft for Windows, Linux, and vSphere〔 * Products of vendors like AMI StorTrends, Tegile, Reduxio, and Tintri〔(【引用サイトリンク】accessdate=2015-03-26 )〕 * ZFS using Hybrid Storage Pools, used for example in some Oracle products 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hybrid array」の詳細全文を読む スポンサード リンク
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