Juniper JSA3800, Руководство по оборудованию, Страница: 49 / 92

CHAPTER 4
Maintaining Components
• Maintaining the JSA3800 RAID Array on page 49
• Maintaining JSA3800 Power System on page 50
Maintaining the JSA3800 RAID Array
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
sas2ircu 0 status
For example,
[root@localhost ~]# sas2ircu Ø status
•
For the device status, use
sas2ircu 0 display
NOTE: You can use this command if the volume state is degraded.
• For the RAID consistency check, use sas2ircu 0 constchk <id> .
where <id> is the Volume ID displayed in the Status output.
49 Copyright © 2019, Juniper Networks, Inc.