Replacing an SM5000 or WS5000 Hard Drive

The SM5000 and WS5000 have four hot-swappable redundant SCSI hard disk drives in a RAID 10 configuration. If a single hard drive fails, the other disk in the RAID mirror takes over, and the appliance continues to function normally. The failed drive can be removed and a replacement drive installed without removing these appliances from the rack, powering down or even exiting the administrative web interface. The appliance automatically detects the removal of a failed or defective drive and the installation of its replacement. After replacement, the RAID controller automatically begins rebuilding the new drive.



SM5000, front view showing the four hard disk drive bays

Hardware Configuration

On the SM5000 and WS5000, the disks are mirrored using RAID 10, so only one disk can be replaced or not be working at a time.

Failure Identification

Remove the front bezel to expose the disk drives. On a failed disk drive, the red LED on the front of the drive is illuminated (the bottom LED of the two drive-specific LEDs) and the appliance's audible alarm is sounding.


Static-Sensitive Devices

CAUTION

Electrostatic discharge (ESD) can damage electronic components. To prevent damage to any printed circuit boards, it is important to handle them very carefully. The following measures are generally sufficient to protect your equipment from ESD damage.

  • Be sure that the appliance chassis is properly grounded through the AC power cord or enclosure frame.
  • Touch a grounded metal object before removing the drive from the antistatic bag.
  • Put on the grounding wrist strap, handle the drive by its edges only, and do not touch components on the bottom.

Single Hard Drive Replacement Procedure

As the disks are mirrored using RAID 10, only one disk can be replaced or not be working at a time.

CAUTION
Disk drives are static-sensitive devices. Please make proper use of the wrist strap included in the disk field-replaceable unit (FRU) ship kit.
CAUTION
Removal of the other drive during this procedure or during the rebuild of the RAID 10 mirror will result in system failure.
  1. Press the colored release button beside the drive’s LEDs on the failed drive to unlatch the handle.

  2. Swing the handle fully out to disengage the drive.

  3. Slide the drive halfway out of the drive bay and wait for it to spin down. Allow 10-20 seconds before removing the drive from the drive bay.

  4. While the system is running, insert the replacement disk in the empty slot. Insert the replacement drive into the disk bay and slide the disk straight to the back of the bay.

  5. Swing the handle in toward the appliance. Continue pushing the handle in until you feel it lock in place.

  6. Press firmly on the both the left and right edges of the drive with both thumbs. Applying this pressure ensures that the drive is fully engaged, even if no movement of the drive is felt.

  7. After the failed disk is replaced, the green and red LEDs on the new disk start to blink and the audible alarm is silenced, indicating that the mirror is rebuilding. Once the rebuild is complete, the red LED goes off. The front bezel can then be replaced.