Maintaining Components; Maintaining The Jsa3800 Raid Array; Chapter 12 Maintaining Components - Juniper 3800 Hardware Manual

Secure analytics

Table of Contents

CHAPTER 12

Maintaining Components

Maintaining the JSA3800 RAID Array on page 47

Maintaining the JSA3800 Power Supply on page 48

Redundant array of independent disk (RAID) is a method of using multiple disks to store

the same data in different locations to increase fault tolerance and improve performance.

A RAID array is used in the servers for data storage and to replicate data among multiple

hard disk drives. There are different RAID levels designed to increase data reliability and

I/O performance.

The key concepts in RAID are:

Mirroring—Copy data to more than one disk

Striping—Split data across more than one disk

Error correction—Redundant data storage to detect and resolve problems

The JSA3800 appliance ships with hot-swappable hard disks to offer component

redundancy. The JSA3800 appliance uses the RAID10 configuration. In RAID10, drives

are duplicated for fault tolerance.

To monitor the JSA3800 RAID array, use the following commands:

For the volume status, use

For example,

[root@localhost ~]# sas2ircu Ø status

For the device status, use

NOTE:

You can use this command if the volume state is degraded.

For the RAID consistency check, use

where <id> is the Volume ID displayed in the Status output.

sas2ircu 0 status

sas2ircu 0 display

sas2ircu 0 constchk <id>

Table of Contents