Introduction to Disk Mirroring

CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems

Disk mirroring defined

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Introduction to Disk Mirroring1

This chapter introduces you to “disk mirroring,” an optional feature of CentreVuCall Management System (CMS) that provides you with a completely redundant set of data, helping to ensure data security. To use disk mirroring, you must have a Sun* Enterprise* 3000 or Sun Enterprise 3500 platform running CMS r3v8.

Disk mirroring defined

Metadevices

“Mirrors” are a feature of the Solstice DiskSuite* software package. They allow you to build a hard disk system containing two—or even three— complete sets of data. Having such data redundancy greatly reduces the risk of data loss should a hard disk drive fail or your system crash. While mirrors greatly reduce the risk of losing data, however, they are not meant to be a substitute for regular backups. Mirrored systems must be

backed up just as often as unmirrored systems.

The Solstice DiskSuite software package allows multiple disk partitions to be logically combined to create a single large partition. Using the Solstice DiskSuite package allows CMS databases to span multiple disks, and so grow quite large.

Solstice DiskSuite uses virtual disks to manage physical disks and their associated data. In Solstice DiskSuite, a virtual disk is called a metadevice. To a software application, a metadevice is identical to a physical disk drive. Solstice DiskSuite handles all I/O requests directed at a metadevice, converting them into I/O requests for the underlying disks.

Solstice DiskSuite metadevices are built from slices (disk partitions). A system controlled by Solstice DiskSuite may contain any number of metadevices, each of which may comprise any combination of disk partitions.

Once a metadevice has been set up, the underlying disk partitions can be accessed only through the metadevice.

*Sun, Enterprise, and Solstice DiskSuite are trademarks or registered trademarks of Sun Microsystems, Inc.

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Lucent Technologies 585-210-940 manual Disk mirroring defined, Metadevices, Backed up just as often as unmirrored systems

585-210-940 specifications

Lucent Technologies, founded in 1996 as a spin-off from AT&T, emerged as a leader in telecommunications, contributing significantly to the advancement of network technologies. The model 585-210-940, an innovative product from Lucent, exemplifies their commitment to providing cutting-edge solutions for communication networks.

The 585-210-940 is primarily recognized as a digital cross-connect system (DCS) designed to manage and route digital voice and data traffic efficiently. This system plays a crucial role in facilitating seamless communication by allowing service providers to interconnect different digital circuits and manage bandwidth effectively. One of the main features of the 585-210-940 is its ability to support multiple protocols, which enhances interoperability among diverse communication platforms.

A standout characteristic of this system is its scalability. The 585-210-940 can adapt to growing network demands, making it suitable for both small enterprises and large service providers. This flexibility ensures that users can expand their systems without a complete overhaul, thereby reducing costs and downtime during upgrades. Additionally, the system provides fault tolerance, ensuring high availability and reliability, which are essential metrics for any critical telecommunications infrastructure.

Lucent Technologies also integrated advanced monitoring and management capabilities into the 585-210-940. This feature allows operators to track performance metrics and identify potential issues in real time. The system includes a user-friendly interface that simplifies network management tasks, making it accessible to operators with varying levels of technical expertise.

Moreover, the 585-210-940 is designed to support high capacity, handling numerous channels simultaneously without compromising performance. This capability is particularly beneficial in environments with heavy data traffic, such as urban centers or large corporate hubs.

In conclusion, Lucent Technologies' 585-210-940 serves as a robust solution for telecommunications, encapsulating many of the core innovations of the late 20th century. With its support for multiple protocols, scalability, fault tolerance, and advanced management capabilities, it stands out as an essential component for any modern communication network, reflecting Lucent's legacy in the industry.