RAID Array

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:

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:

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