Administrator's Guide

13. Place the enclosure into the rack, and then tighten the two retaining screws.
WARNING! The messaging system enclosure is heavy, even after removing the hard drives.
Always use at least two people to replace the messaging system in the rack.
14. Replace both server blades in their original bays.
15. Extend the hard drive drawer:
1. Press upward on the release button on the hard drive drawer (1).
2. Pull the drawer handle down 90 degrees (2).
3. Extend the hard drive drawer (3).
16. Replace all hard drives.
IMPORTANT: Install the hard drives in the same slots from which you removed them or the
system might fail. Use the drive labels to ensure they are replaced in the correct order.
17. Push the hard drive drawer back into the messaging system enclosure.
18. Plug in all cables at the back of the messaging system enclosure, and ensure that all cables
are returned to their original locations.
19. Power on the system by pressing the power button On.
20. Confirm the messaging system has resumed normal operations.
Removing and replacing a SAS cable
CAUTION: Remove only one cable at a time to prevent downtime.
IMPORTANT: Check the QuickSpecs for the device before you purchase and connect SAS cables
to ensure that the cables do not exceed the maximum supported length. Only specific cable lengths
were tested and approved for use with external expansion nodes.
IMPORTANT: Ensure that cabling in the back of the rack system does not interfere with system
operation or maintenance. Bind cables loosely with cable ties and route the excess out of the way,
along the side of the rack. When cables are tied together and routed down the side of the rack,
system components and indicators are easily visible and accessible.
Removing the SAS cable
To remove the SAS cable:
1. Verify the failed component by checking for a LED status on the failed component.
2. Remove the SAS cable that connects the messaging system SAS I/O module to the switch.
82 Removing and replacing hardware components