Help with RAID Disk Arrays specifications:
General Specifications
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| RAID Level Supported | |||
| Your choices are... | |||
| RAID 0 | Data is split across drives. RAID Level 0 is not redundant. Failure of any disk in the array results in all data loss. This level is also known as striping. | ||
| RAID 1 | RAID 1 is also known as mirroring with two hard drives. It provides redundancy by duplicating all data from one drive to another drive. | ||
| RAID 2 | RAID Level 2 uses hamming error correction codes for error detection. It is used with drives that do not have built-in error detection. | ||
| RAID 3 | RAID Level 3 strips data at a byte level across several drives, with parity stored on one drive. | ||
| RAID 4 | RAID Level 4 strips data at the block level across several drives, with parity stored on one drive. The parity information allows recovery from the failure of any single drive. RAID Level 4 performance is very good for reads, but writes require that parity data be updated each time. | ||
| RAID 5 | RAID Level 5 is also known as striping with distributed parity. RAID Level 5 is similar to Level 4, but distributes parity among the drives. No single disk is dedicated to parity. | ||
| RAID 10 | Combines RAID 0 striping and RAID 1 mirroring spanned across multiple drive groups (super drive group). This level provides redundancy through mirroring. | ||
| RAID 30 | Data is "striped" across multiple drive groups (super drive group). Maintains parity information that can be used for data recovery. | ||
| RAID 50 | Data is "striped" across multiple drive groups (super drive group). For data redundancy, drives are encoded with rotated XOR redundancy. | ||
| JBOD | Sometimes referred to as "Just a Bunch of Drives." Each drive is operated independently like a normal disk controller, or drives may be spanned and seen as a single drive. This level does not provide data redundancy. | ||
| Other | Other types such as NRAID, etc. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Disk Channels Interface | |||
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| SCSI | Small Computer System Interface (SCSI) is an interface standard for connecting peripheral devices to computers. Hardware components for implementing a SCSI interface include connector ports on computers and cables for connecting peripheral devices to the computer. SCSI is gradually being supplanted by the newer USB standard. | ||
| Fibre Channel | Fibre Channel technology uses optical fibers to connect computers and peripheral devices that require high bandwidth. It functions via a serial data transfer architecture that is compatible with SCSI. The most prominent Fibre Channel standard is Arbitrated Loop (FC-AL) which can support full-duplex data transfer rates of 100MBps. | ||
| ATA (PATA) | ATA (Advanced Technology Attachment) is a disk drive implementation that integrates the controller on the disk drive itself. It is an interface standard that extends the ISA bus of the IBM PC-AT to attach peripherals. It is also known as Parallel ATA (PATA). The original ATA is better known as IDE. There are several types of ATA. ATA: Known also as IDE, supports one or two hard drives, a 16-bit interface and PIO modes 0, 1 and 2. ATA-2: Supports faster PIO modes (3 and 4) and multiword DMA modes (1 and 2). Also supports logical block addressing (LBA) and block transfers. ATA-2 is also known as Fast ATA and Enhanced IDE (EIDE). ATA-3: Minor revision to ATA-2. Ultra-ATA: Also called ATA-33, Ultra DMA, UDMA and DMA-33, supports multiword DMA mode 3 running at 33 MBps. ATA/66: A version of ATA proposed by Quantum Corporation, and supported by Intel, that doubles Ultra ATA's throughput to 66 MBps. ATA/100: A version of ATA proposed by Quantum Corporation, and supported by Intel, that supports 100 MBps. ATA/133 that supports transfer rates of up to 133 MBps. | ||
| SATA | Serial ATA (Serial Advanced Technology Attachment, or SATA) is a serial interface standard that extends the ISA bus of the IBM PC-AT to attach peripherals. The original ATA is better known as IDE. Serial ATA is a disk-interface technology developed by a group of the industry's leading vendors to replace parallel ATA. Serial ATA is a point-to-point connection and allows multiple ports to be aggregated into a single controller that is typically located either on the motherboard or as an add-in, RAID card. Serial ATA technology can deliver at least 1.5 Gbps (150 MB/sec) of performance to each drive within a disk drive array. | ||
| Other | Other unlisted or proprietary disk interfaces. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Host Interface | |||
| Your choices are... | |||
| 32-bit PCI | Peripheral Component Interconnect (PCI) is a local bus system designed for high-end computer systems. It transfers 32 or 64 bits of data at a clock speed of 33 MHz. The PCI bus supports 3 to 5 critical peripherals, which are either integrated directly onto the motherboard or added via expansion cards. The PCI bus fully supports cards developed for standard I/O buses. 32-bit PCI is a 32-bit bus that supports rates of 33 MHz. | ||
| 64-bit PCI | Peripheral Component Interconnect. PCI is a local bus system designed for high-end computer systems. It transfers 32 or 64 bits of data at a clock speed of 33 MHz. The PCI bus supports 3 to 5 critical peripherals, which are either integrated directly onto the motherboard or added via expansion cards. The PCI bus fully supports cards developed for standard I/O buses. 64-bit PCI is a 32-bit bus that supports rates of 66 MHz. | ||
| SCSI | Small Computer System Interface (SCSI) is an interface standard for connecting peripheral devices to computers. Hardware components for implementing a SCSI interface include connector ports on computers and cables for connecting peripheral devices to the computer. SCSI is gradually being supplanted by the newer USB standard. | ||
| Fibre Channel | Fibre Channel technology uses optical fibers to connect computers and peripheral devices that require high bandwidth. It functions via a serial data transfer architecture that is compatible with SCSI. The most prominent Fibre Channel standard is Arbitrated Loop (FC-AL) which can support full-duplex data transfer rates of 100MBps. | ||
| IEEE 1394 (FireWire®) | IEEE 1394 or FireWire® is an interface standard adopted by the Institute of Electrical and Electronics Engineers (IEEE) for very fast digital data transfers such as streaming video. IEEE 1394 connectors are used to transmit and receive data among FireWire devices, and are designed to replace external high-speed peripheral connections to personal computers, including hard disks, CD-ROMs, DVDs, graphics cards, high-speed scanners, direct video, monitors, etc. Tiny, robust FireWire connectors will also become important parts of home entertainment, communication, and appliance networks. FireWire is a registered trademark of Apple Computer, Inc. | ||
| USB | Universal serial bus (USB) is a 4-wire, 12-Mbps serial bus for low-to-medium speed peripheral device connections to personal computers (PC), including keyboards, mice, modems, printers, joysticks, audio functions, monitor controls, etc. The USB design is standardized by the USB Implementers Forum (USBIF), an organization that includes leading companies from the computer and electronics industries. The current USB specification is USB 2.0, which supports data transfer rates of up to 480 Mbps. | ||
| Other | Other unlisted or proprietary host interfaces. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Mounting Options: | Manufacturers use many of these terms interchangeably. Keeping this in mind, we have delineated the options as follows to help you locate the ideal item(s) for your needs. | ||
| Your choices are... | |||
| Chassis Mount | The device can be attached to, or within, the supporting frame of a structure (chassis), exclusive of the body or housing. Some chassis varieties can be mounted within a rack. | ||
| Free Standing | The device does not need to be mounted. It can stand on its own. | ||
| Integrally Mounted | The component is soldered, hard-wired, or otherwise permanently attached as part of a system. | ||
| Panel Mount | The device can be placed into, or through, a depression within an existing panel so that it's face is flush, or nearly flush, with the panel. | ||
| Rack Mount | The device can be mounted directly into a rack. It comes equipped with the necessary rail guides, flanges, or tabs to be mounted in this fashion. The standard 19" rack is typical of this style. | ||
| Other | Other unlisted mounting options. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Performance
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| Number of Disks | The number of disks in the array. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Maximum Capacity | The total capacity (in MB) of the disk array system. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Maximum Data Transfer Rate: | The rate (in MBytes/sec) of the data transmitted to the disk arrays from the controller. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Operating Temperature: | This is the full required range of ambient operating temperature. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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Features
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| Hot-swap supported | The array supports hot-swap replacement of disks. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Redundant Fans | The array subsystem has redundant fans for cooling. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Redundant Temperature Sensor | The disk subsystem has a temperature sensor to measure and/or control the temperature of the array. Normally this sensor sends data to an indicator for proper action. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Failure Indicator | Indicators such as LCD buzzers or email notification capabilities to signal a failure in the system. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| System / Status Indicators | LED or other types of indicators to indicates system and hard disk status, to show system and hard disks READ or WRITE status, or any other type. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Other | Other unlisted or proprietary features. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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