CMD Technology introduces the CRD-5500 "active-active" redundant controller option.IRVINE, Calif.--(BUSINESS WIRE)--Nov. 5, 1996-- Active fault tolerance See fault tolerant. (architecture) fault tolerance - 1. The ability of a system or component to continue normal operation despite the presence of hardware or software faults. This often involves some degree of redundancy. 2. is provided at the controller level CMD CMD cerebromacular degeneration. Technology, the recognized leader in advanced high-end RAID contoller technology, on Tuesday introduced its new CRD-5500 redundant controller option providing users with a truly "fault tolerant The ability to continue non-stop when a hardware failure occurs. A fault-tolerant system is designed from the ground up for reliability by building multiples of all critical components, such as CPUs, memories, disks and power supplies into the same computer. " solution at the controller level. CMD's CRD-5500 "Viper Architecture" controller is acknowledged as one of the industry's premiere RAID 0, 1, 0+1, 4 and 5 RAID controllers available for configuration flexibility, performance and fault resistance. This new option now allows CRD-5500 users to configure a redundant RAID subsystem with an "active" redundant CRD-5500 controller. Featuring two independent RAID controllers connected together in a fail-over configuration, the new CRD-5500 redundant controller option brings a new level of performance and "active- active" fault tolerance to open architecture RAID subsystems. The redundant controller seamlessly takes over all read/write functions in the unlikely event the primary controller should fail. This enhances data availability Refers to the degree to which data can be instantly accessed. The term is mostly associated with service levels that are set up either by the internal IT organization or that may be guaranteed by a third party datacenter or storage provider. by allowing all of the user's applications to continue operating uninterrupted should a controller fail. The fail-over transition occurs without the need for operator intervention. "We have stunned stun tr.v. stunned, stun·ning, stuns 1. To daze or render senseless, by or as if by a blow. 2. To overwhelm or daze with a loud noise. 3. the industry by releasing this true 'active- active' fail-over capability at such a reasonable price," said Fred Thiel Fred Thiel is a young entrepreneur of Swedish descent. Fred was born in France and educated in the U.S. and UK before returning to Sweden to write software for banks. He has also lived in Venezuela and as a result, speaks French, Swedish and Spanish fluently. , CMD's vice president of marketing. "Unlike our 'active- passive' competitors, with the CRD-5500, both of the controllers share the workload, improving performance and maximizing customers' investment in controller and cache hardware. "In contrast with an 'active-passive' fail-over system, one of your RAID controllers and its cache sits idle while the other carries the entire performance burden. This essentially results in half of the customer's RAID investment going unused." One of the biggest benefits of fault tolerance is data availability. Fault-tolerant RAID controllers offer much higher levels of data availability by allowing continued operation even in the event of a controller failure. Fault-tolerant RAID solutions are possible only when you have a redundant controller configuration. In this situation, if a controller fails, all I/O (Input/Output) The transfer of data between the CPU and a peripheral device. Every transfer is an output from one device and an input to another. See PC input/output. I/O - Input/Output activity is transferred to the alternative controller, and data processing data processing or information processing, operations (e.g., handling, merging, sorting, and computing) performed upon data in accordance with strictly defined procedures, such as recording and summarizing the financial transactions of a continues uninterrupted. This is done transparently to the host computer and its running applications. The CRD-5500 fail-over option provides additional protection against data loss by keeping two copies of cache data in each controller at all times. With this "cache mirroring," in the event that a cache module fails, the duplicated data in the surviving cache modules are written to the disk. Additionally, because all of the redundant functionality is based in the CRD-5500 RAID system, it is operating-system and platform independent. This means the operating system operating system (OS) Software that controls the operation of a computer, directs the input and output of data, keeps track of files, and controls the processing of computer programs. does not need to be involved in the fail-over operation itself, reducing system and operator overhead. Targeted at the rapidly expanding market for high performance and data sensitive storage, the CRD-5500's is designed to provide all of the features and performance of higher-priced RAID subsystem options, but at a much lower cost. The redundant controller functionality has been added to the CRD-5500 at no extra charge to the customer. CMD has also introduced a line of rack-mount controllers and chassis called the Trident RAIDarray(tm) that implement this active-active controller configuration. This rack-mount controller provides redundant N+1 power supplies, redundant cooling fans and battery backup See UPS. for each controller. Aimed at higher-end data center applications, the Trident RAIDarray controller can be rack-mounted into standard RETMA RETMA Radio Electronics Television Manufacturers Association (rack spacing) or Digital Storage Works cabinets. CMD Technology is a leading provider of high performance storage interface and fault-tolerant RAID controller technology in the PC and midrange midrange Epidemiology The halfway point or midpoint in a set of observations; for most data, MR is calculated as the sum of the smallest observation and the largest observation, divided by 2; for age data, one is added to the numerator; a midrange is usually system market. Storage solutions based on CMD Technology products are found in thousands of mission critical applications and data centers worldwide. For more information, contact CMD Technology Inc., 1 Vanderbilt, Irvine, Calif. 92618. Telephone, fax, e-mail and Web page, respectively, are 714/454-0800, 714/455-1656, info@cmd.com and http://www.cmd.com. -0- NOTE: Copyright 1996 CMD Technology Inc. RAIDarray is a trademark of CMD Technology Inc. All other brand names and trademarks are properties of their respective holders. CONTACT: CMD Technology Inc., Irvine Lisa Heller, 714/470-3172 |
|
||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion