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Maintaining the JATP400 Hard Disk Drive

Maintaining the JATP400 RAID Array

Redundant array of inexpensive disk (RAID) is a method of storing large amounts of application data used for data redundancy, performance improvement, or both. 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 JATP400 appliance ships with hot-swappable hard disks to offer component redundancy. The JATP400 appliance uses the RAID6 configuration. In RAID6, drives are duplicated for fault tolerance.

Replacing a Hard Drive on the JATP400 Appliance

To replace a hard drive from a driver carrier on the JATP400 appliance:

  1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
  2. To remove a hard disk carrier:
    1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.

    2. Press the eject button on the right side of the disk slot to release the hard drive. See Figure 1.

      The hard drive pops partially out of the slot.

      Figure 1: Removing a Drive CarrierRemoving a Drive Carrier
    3. Grasp the drive carefully and slide it completely out of the slot.

    4. Place the hard drive carrier on the antistatic mat.

    5. Remove the screws that secure the hard drive to the carrier and separate the hard drive from the carrier.

  3. To reinstall a hard disk carrier:
    1. With the front of the hard drive toward the front of the drive carrier, position the drive in the drive carrier and align the screw holes over the pins on the rails.

    2. Secure the drive to the carrier with the screws provided,

    3. Push the carrier completely into the drive bay until you hear a click when the hard drive is fully inserted.

      This indicates that the carrier has been fully seated and connected to the midplane, which automatically makes the power and logic connections to the hard drive.