Game Action RPG PS3 Xbox360 Playstation 3 Wii Nintendo Sony Capcom Sega Microsoft Technology Flash Drive IT BLOG

ขอโทษเพื่อนชาวไทยด้วยนะครับ = = เนื่องจากบทความมีความยาวมาก ขอให้เพื่อนๆแกะอ่านกันเองนะครับ ขอประทานโทษจริงๆครับ มันยาวมากจริงๆ

________________________________________________________________________________

The first ferrite memory SSD devices, or auxiliary memory units as they were called at the time, emerged during the era of vacuum tube computers. But with the introduction of cheaper drum storage units, their use was discontinued. Later, in the 1970s and 1980s, SSDs were implemented in semiconductor memory for early supercomputers of IBM, Amdahl and Cray; however, the prohibitively high price of the built-to-order SSDs made them quite seldom used.

In 1978 StorageTek developed the first modern type of solid-state drive. In the mid-1980s Santa Clara Systems introduced BatRam, an array of 1 megabit DIP RAM Chips and a custom controller card that emulated a hard disk. The package included a rechargeable battery to preserve the memory chip contents when the array was not powered. The Sharp PC-5000, introduced in 1983, used 128 kilobyte (128 KB) solid-state storage cartridges, containing bubble memory.

RAM "disks" were popular as boot media in the 1980s when hard drives were expensive, floppy drives were slow, and a few systems, such as the Amiga series, the Apple IIgs, and later the Macintosh Portable, supported such booting. Tandy MS-DOS machines were equipped with DOS and DeskMate in ROM, as well. At the cost of some main memory, the system could be soft-rebooted and be back in the operating system in mere seconds instead of minutes. Some systems were battery-backed so contents could persist when the system was shut down.

In 1995 M-Systems introduced flash-based solid-state drives. (SanDisk acquired M-Systems in November 2006.) Since then, SSDs have been used successfully as hard disk drive replacements by the military and aerospace industries, as well as other mission-critical applications. These applications require the exceptional mean time between failures (MTBF) rates that solid-state drives achieve, by virtue of their ability to withstand extreme shock, vibration and temperature ranges.

SSDs have begun to appear in laptops, although as of 2009 they are substantially more expensive per unit of capacity than hard drives (US$580 for a 256 GB SSD, vs. US$50 for a similar size external USB HDD).

Enterprise Flash drives (EFDs) are designed for applications requiring high I/O performance (Input/Output Operations Per Second), reliability and energy efficiency.

On September 25, 2007, Fusion-io announced the ioDrive to be available in Q4 2007, with capacities of 80GB, 160GB and 320GB. The ioDrive actually did not begin shipping until April 7, 2008.

OCZ has recently demonstrated at Cebit 2009 a 1 TB flash SSD drive utilizing a PCI Express x8 interface. It achieves a minimum read speed of 654MB/s and maximum read speed of 712MB/s.

On March 2, 2009, Hewlett-Packard announced the HP StorageWorks IO Accelerator, the world's first enterprise flash drive especially designed to attach directly to the PCI fabric of a blade server. The mezzanine card, based on Fusion-io's ioDrive technology, serves over 100,000 IOPS and up to 800MB/s of bandwidth. HP provides the IO Accelerator in capacities of 80GB, 160GB and 320GB.

In April 2009, Texas Memory System announced the highest capacity rack mounted flash storage unit to date, a 5TB RamSan-620. It has a throughput of 3GB/s and a sustained random read/write of 250,000 I/O's per second (IOPS). It utilizes high-speed Fibre Channel or InfiniBand interface for data transfers.

On May 4, 2009, DDRdrive LLC introduced the PCI Express based DDRdrive X1. It integrates both 4GB DRAM and 4GB NAND for a total drive capacity of 4GB and targets IOPS intensive enterprise storage, achieving up to 300,000+ Random 512B Read IOPS, a power efficiency of 30,000+ IOPS/W, and a cost effectiveness of 200+ IOPS/$.

On May 5, 2009, Photofast announced the G-Monster-PROMISE PCIe SSD with capacity choices from 128GB to 1TB, with 1000MB/s of read/write speeds.

Credit : en.wikipedia.org

edit @ 18 Jul 2009 10:05:14 by Nurinaki