Introduction To Disk Mirroring; Disk Mirroring Defined; Metadevices - Lucent Technologies CentreVu Release 3 Version 8 Disk-Mirrored Systems User Manual

Introduction to Disk Mirroring

Disk mirroring defined

Introduction to Disk Mirroring
Disk mirroring defined

Metadevices

* Sun , Enterprise , and Solstice DiskSuite are trademarks or registered trademarks of Sun Microsystems, Inc.
CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems
This chapter introduces you to "disk mirroring," an optional
feature of CentreVu Call 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
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Sun Enterprise 3000 or Sun Enterprise 3500 platform running
CMS r3v8.
"Mirrors" are a feature of the Solstice DiskSuite
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
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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.
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software package. They
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