Monitoring Hardware Components; Raid Array - Juniper JSA1500 Hardware Manual

CHAPTER 21

Monitoring Hardware Components

RAID Array

Copyright © 2018, Juniper Networks, Inc.
RAID Array on page 133
Power Supply on page 134
Cooling Fans on page 135
Maintaining the JSA7500 Air Filter on page 136
The JSA appliance ships with hot-swappable hard disks to offer component redundancy.
The JSA1500 appliance has a RAID1 configuration. The second (redundant) disk maintains
a copy of the software image and configuration information on the working hard disk. If
the working hard disk fails, the redundant hard disk immediately assumes responsibility
for JSA operations. JSA3500, JSA5500, and JSA7500 have RAID10 configuration. You
can hot-swap the disk if any one of the disks fails.
Redundant array of independent disk (RAID) is an organization of multiple disks of fault
tolerance and performance. A RAID array is used in the servers for data storage and to
replicate data among multiple hark 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
JSA1500 uses RAID1, and JSA3500, JSA5500, and JSA7500 use RAID10. RAID1 uses
mirroring and duplex techniques to copy data to the redundant disk. In RAID10, drives
are duplicated for fault tolerance.
To monitor the RAID array, use the following commands:
For JSA1500, JSA3500, and JSA5500 volume status:
sas2ircu Ø status
For example,
[root@localhost ~]# sas2ircu Ø status
For JSA1500, JSA3500, and JSA5500 device status:
133