peripheral devices

A piece of hardware (such as a video monitor, disk drive, printer, or CD-ROM) used with a computer and under the control of the computer. SCSI peripherals are controlled through a MegaRAID 8480 Storage Adapter (host adapter).

PHY

The interface required to transmit and receive data packets transferred

 

across the serial bus.

 

Each PHY can form one side of the physical link in a connection with a

 

PHY on a different SATA device. The physical link contains four wires that

 

form two differential signal pairs. One differential pair transmits signals,

 

while the other differential pair receives signals. Both differential pairs

 

operate simultaneously and allow concurrent data transmission in both

 

the receive and the transmit directions.

RAID

Acronym for Redundant Array of Independent Disks (originally

 

Redundant Array of Inexpensive Disks). An array of multiple independent

 

physical disks managed together to yield higher reliability and/or

 

performance exceeding that of a single physical disk. The RAID array

 

appears to the controller as a single storage unit. I/O is expedited

 

because several disks can be accessed simultaneously. Redundant

 

RAID levels (RAID levels 1, 5, 10, and 50) provide data protection.

RAID levels

A set of techniques applied to disk groups to deliver higher data

 

availability, and/or performance characteristics to host environments.

 

Each virtual disk must have a RAID level assigned to it.

SAS

Acronym for Serial Attached SCSI. A serial, point-to-point,

 

enterprise-level device interface that leverages the proven SCSI protocol

 

set. The SAS interface provides improved performance, simplified

 

cabling, smaller connections, lower pin count, and lower power

 

requirements when compared to parallel SCSI. The SAS controller

 

leverages a common electrical and physical connection interface that is

 

compatible with Serial ATA. The SAS controller supports the ANSI Serial

 

Attached SCSI standard, version 1.0. In addition, the controller supports

 

the Serial ATA II (SATA II) protocol defined by the Serial ATA

 

specification, version 1.0a. Supporting both the SAS and SATA II

 

interfaces, the SAS controller is a versatile controller that provides the

 

backbone of both server and high-end workstation environments. Each

 

port on the RAID controller supports SAS and/or SATA II devices.

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Copyright © 2006-2007 by LSI Corporation. All rights reserved.

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IBM MegaRAID 8480 manual Peripheral devices, RAID levels
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MegaRAID 8480 specifications

The IBM MegaRAID 8480 is a high-performance RAID (Redundant Array of Independent Disks) controller designed for enterprise-class storage environments. It delivers advanced data protection, high availability, and exceptional scalability, making it an ideal choice for businesses that require robust data management solutions.

One of the main features of the IBM MegaRAID 8480 is its support for both SAS (Serial Attached SCSI) and SATA (Serial ATA) drives, providing flexibility in storage configurations. This controller supports up to 128 devices, allowing organizations to build large, efficient storage arrays that can accommodate extensive data needs.

The MegaRAID 8480 utilizes advanced RAID levels, including RAID 0, 1, 5, 6, 10, 50, and 60, enabling users to select the level of data redundancy and performance that best fits their specific requirements. The controller also supports online capacity expansion and RAID level migration, ensuring that users can seamlessly adapt their storage configurations as their business evolves.

In terms of performance, the MegaRAID 8480 is equipped with 8GB of DDR4 cache memory, which significantly enhances data access speeds and provides improved I/O performance. With the ability to process a large number of transactions simultaneously, this controller is well-suited for demanding enterprise applications, such as database management systems and virtualized environments.

To further enhance data protection, the MegaRAID 8480 features battery-backed write cache technology. This ensures that data in the cache is not lost in the event of a power failure, safeguarding critical information. Furthermore, the MegaRAID SafeStore technology offers additional protection through encryption-key management, which helps safeguard sensitive data from unauthorized access.

Another notable characteristic is the intuitive management interface provided by the MegaRAID Storage Manager software. This tool streamlines storage monitoring and enables users to easily manage their RAID configurations. Additionally, the controller supports advanced diagnostic features that assist administrators in identifying and resolving potential issues before they escalate.

The IBM MegaRAID 8480 is designed for the modern data-driven enterprise, combining performance, reliability, and scalability into a comprehensive storage solution. With its robust set of features and cutting-edge technology, it empowers organizations to enhance their data management strategies while ensuring that their critical applications remain available and secure. This makes the MegaRAID 8480 a standout choice for businesses seeking to future-proof their storage infrastructure.
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