PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Solaris(TM) Operating System)
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Chapter 1 Function> 1.2 Functions for High Availability

1.2.1 Disk Mirroring

Disk mirroring utilizes multiple disks in order to maintain data synchronization.

GDS realizes disk mirroring by creating one logical disk from multiple physical disks.

Disk mirroring allows applications to access a different disk even if one mirror disk (a disk that is mirrored) fails. Therefore, data will not be damaged and the applications will continue normal operation.


[Figure: Disk Mirroring]


GDS supports mirroring of a single disk unit (JBOD) and mirroring of disk arrays. It can mirror disk units of various usage and configuration, including a system disk installed with an operating system, and a disk connected to multiple servers.

Some examples of special mirroring implementation are explained below.


Down1.2.1.1 System Disk Mirroring
Down1.2.1.2 Mirroring between Disk Array Unit
Down1.2.1.3 Shared Disk Mirroring
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