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ExpressCache
ExpressCache is a Windows-based SSD caching technology developed by Condusiv Technologies and licensed to a number of laptop manufacturers including Acer, ASUS, Samsung, Sony, Lenovo, and Fujitsu. ExpressCache is also bundled with some SanDisk products such as ReadyCache; SanDisk currently holds an exclusive ExpressCache license for stand-alone storage products. A test by ''PC Pro'' of the 2011-launched Samsung 700Z, which included an 8 GB SSD and a 7200 rpm hard drive, showed a reduction of five seconds in boot time with Windows 7, when ExpressCache was enabled. Another vendor's demo at Computex 2011, involving a laptop also equipped with an 8 GB SDD, showed a boot-time reduction of about ten seconds. A test by ''CDRLabs'' of a stand-alone 32 GB SanDisk ReadyCache product, which was added to a quad-core desktop (Core i5-2400 CPU) equipped with a 7200 rpm hard drive, found a reduction in boot time from 25 down to 14 seconds, but found no significant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Condusiv Technologies
Condusiv Technologies is an American software company based in Burbank, California. The company was formerly known as Diskeeper Corporation, a name derived from its flagship product, Diskeeper, a file-system defragmentation software package for Microsoft Windows and OpenVMS. Before adopting the Diskeeper name, the company was known as Executive Software International, Inc. Products Condusiv Technologies sells and supports a number of software products. Diskeeper, a tool for reducing file fragmentation; V-locity Virtual Machine, a platform disk optimizer for virtual server; Undelete, which offers protection from and recovery of accidentally deleted files. Condusiv sells its products to OEMs (original equipment manufacturers) including SanDisk, Samsung and LG. Condusiv OEM products include ExpressCache, which exploits a small-density SSD as a cache for a larger-capacity HDD, thus improving boot times and applications launch. The company also has several technologies such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel Turbo Memory
Intel Turbo Memory is a technology introduced by Intel Corporation that uses NAND flash memory modules to reduce the time it takes for a computer to power up, access programs, and write data to the hard drive. During development, the technology was codenamed Robson. It is supported by most of the Core 2 Mobile chipset series, but not by the newer Core i Series mobile chipsets. Overview The technology was publicly introduced on October 24, 2005, at the Intel Developer Forum (IDF) in Taiwan when a laptop that booted up almost immediately was demonstrated. The technology attempts to decrease hard drive usage by moving frequently accessed data over to the flash memory. Flash memory can be accessed faster than hard drives and requires less power to operate, thereby allowing laptops to operate faster while also being more power efficient. The Turbo memory cache connects to a motherboard via a mini-PCIe interface. It supports features available in Microsoft Windows Vista, namely ReadyBo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smart Response Technology
In computer data storage, Smart Response Technology (SRT, also called SSD Caching before it was launched) is a proprietary caching mechanism introduced in 2011 by Intel for their Z68 chipset (for the Sandy Bridge–series processors), which allows a SATA solid-state drive (SSD) to function as cache for a (conventional, magnetic) hard disk drive (HDD). SRT is managed by Intel Rapid Storage Technology software version 10.5 or later, and implemented both in its device driver and in 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. The user can select write-back (so-called maximized mode) or write-through (so-called enhanced mode) caching strategy. 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 th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid Drive
In computing, a hybrid drive (solid state hybrid drive – SSHD) is a logical or physical storage device that combines a faster storage medium such as solid-state drive (SSD) with a higher-capacity hard disk drive (HDD). The intent is adding some of the speed of SSDs to the cost-effective storage capacity of traditional HDDs. The purpose of the SSD in a hybrid drive is to act as a cache for the data stored on the HDD, improving the overall performance by keeping copies of the most frequently used data on the faster SSD drive. There are two main configurations for implementing hybrid drives: dual-drive hybrid systems and solid-state hybrid drives. In dual-drive hybrid systems, physically separate SSD and HDD devices are installed in the same computer, having the data placement optimization performed either manually by the end user, or automatically by the operating system through the creation of a "hybrid" logical device. In solid-state hybrid drives, SSD and HDD functionalities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid Array
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, compared to 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 data centers and cloud computing. Implementations Some commercial products for building hybrid arrays include: * Adaptec demonstrated the MaxIQ series in 2009. * Apple's Fusion Drive * Linux software includes bcache, dm-cache, and Flashcache (and its fork EnhanceIO). * Condusive's ExpressCache is marketed for laptops. * EMC Corporation VFcache was announced in 2012. * Fusion-io acquired ioTurbine in 2011, and the product lin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fusion Drive
Fusion Drive is a type of hybrid drive technology created by Apple Inc. It combines a hard disk drive with a NAND flash storage (solid-state drive of 24 GB or more) and presents it as a single Core Storage managed logical volume with the space of both drives combined. The operating system automatically manages the contents of the drive so the most frequently accessed files are stored on the faster flash storage, while infrequently used items move to or stay on the hard drive. For example, if spreadsheet software is used often, the software will be moved to the flash storage for faster user access. In software, this logical volume speeds up performance of the computer by performing both caching for faster writes and auto tiering for faster reads. Availability The Fusion Drive was announced as part of an Apple event held on October 23, 2012, with the first supporting products being two desktops: the iMac and Mac Mini with OS X Mountain Lion released in late 2012. Fusion Driv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsoft Windows
Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for servers, and Windows IoT for embedded systems. Defunct Windows families include Windows 9x, Windows Mobile, and Windows Phone. The first version of Windows was released on November 20, 1985, as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUIs). Windows is the most popular desktop operating system in the world, with 75% market share , according to StatCounter. However, Windows is not the most used operating system when including both mobile and desktop OSes, due to Android's massive growth. , the most recent version of Windows is Windows 11 for consumer PCs and tablets, Windows 11 Enterprise for corporations, and Windows Server 2022 for servers. Genealogy By marketing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ReadyDrive
Windows Vista introduced a number of new Input/output, I/O functions to the Microsoft Windows line of operating systems. They are intended to shorten the time taken to boot the system, improve the responsiveness of the system, and improve the reliability of data storage. I/O subsystem Vista modifies the behavior of Overlapped I/O, asynchronous I/O operations. With the new asynchronous I/O APIs, a Thread (computer science), thread, different from the one that issued the I/O request, can be notified when the operation completes. With this, a single thread can issue all the I/O requests, and then switch to a different worker thread. If this thread is the one that handles the data after the I/O request completes, then a thread-switch, which causes a performance hit, may be avoided. Windows Vista also introduces synchronous I/O cancellation. During a synchronous I/O request, the application is blocked until the request is serviced or fails. In Windows Vista the application may issue a ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EnhanceIO
EnhanceIO is a disk cache module for the Linux kernel. Its goal is to use fast but relatively small SSD drives to improve the performance of large but slow hard drives. Overview EnhanceIO makes it possible to add an SSD or other fast disk device as a cache to another block device, such as a hard drive, in order to improve the performance of the disk. It was initially based on Facebook's similar Flashcache module. Unlike Flashcache and other caching solutions, it doesn't use the Linux device mapper. This means it does not create a new block device and caching can be added to existing disks, without reformatting or even unmounting them. This makes it easy to add cache to existing systems. History EnhanceIO was first announced as a commercial product in 2011 by sTec Inc, a company specializing in SSD products. Late 2012 sTec published code for the Linux module on GitHub. Even though it was then soon submitted to the Linux kernel mailing list, it was never merged into the main kernel. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dm-cache
dm-cache is a component (more specifically, a target) of the Linux kernel's device mapper, which is a framework for mapping block devices onto higher-level virtual block devices. It allows one or more fast storage devices, such as flash-based solid-state drives (SSDs), to act as a cache for one or more slower storage devices such as hard disk drives (HDDs); this effectively creates hybrid volumes and provides secondary storage performance improvements. The design of dm-cache requires three physical storage devices for the creation of a single hybrid volume; dm-cache uses those storage devices to separately store actual data, cache data, and required metadata. Configurable operating modes and cache policies, with the latter in the form of separate modules, determine the way data caching is actually performed. dm-cache is licensed under the terms of GNU General Public License (GPL), with Joe Thornber, Heinz Mauelshagen and Mike Snitzer as its primary developers. Overview dm- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bcache
bcache (abbreviated from ''block cache'') is a cache in the Linux kernel's block layer, which is used for accessing secondary storage devices. It allows one or more fast storage devices, such as flash-based solid-state drives (SSDs), to act as a cache for one or more slower storage devices, such as hard disk drives (HDDs); this effectively creates hybrid volumes and provides performance improvements. Designed around the nature and performance characteristics of SSDs, bcache also minimizes write amplification by avoiding random writes and turning them into sequential writes instead. This merging of I/O operations is performed for both the cache and the primary storage, helping in extending the lifetime of flash-based devices used as caches, and in improving the performance of write-sensitive primary storages, such as RAID 5 sets. bcache is licensed under the GNU General Public License (GPL), and Kent Overstreet is its primary developer. Overstreet considers bcache as a " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multi-level Cell
In electronics, a multi-level cell (MLC) is a memory cell capable of storing more than a single bit of information, compared to a single-level cell (SLC), which can store only one bit per memory cell. A memory cell typically consists of a single floating-gate MOSFET (metal–oxide–semiconductor field-effect transistor), thus multi-level cells reduce the number of MOSFETs required to store the same amount of data as single-level cells. Triple-level cells (TLC) and quad-level cells (QLC) are versions of MLC memory, which can store three and four bits per cell respectively. The name "''multi''-level cell" is sometimes used specifically to refer to the "''two''-level cell". Overall, the memories are named as follows: # Single-level cell or SLC (1 bit per cell) # Multi-level cell or MLC (2 bits per cell), alternatively double-level cell or DLC # Triple-level cell or TLC (3 bits per cell) or 3-Bit MLC # Quad-level cell or QLC (4 bits per cell) # Penta-level cell or PLC (5 bits per ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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