Replace A Sas Expander Module - Seagate Exos CORVAULT Hardware Installation And Maintenance Manual

13. If you are replacing all disk drives, repeat the entire process for each of them.
14. Verify the disk drive fault LED is off.
15. Return to the front panel of the storage enclosure and verify that neither the Fault-Main bay nor the Fault-Auxiliary
bay LED is steady amber.
16. Complete one of the following actions, based on the location of the disk drive:
a. For disk drives in the main bay: Close the half of the main bay cover you opened, latching it firmly in place.
b. For disk drives in the auxiliary bay: Replace the auxiliary bay cover, latching it firmly in place.
17. (Optional) Lower and remove the mechanical lift.
18. Facing the front panel, press both safety lock switches to release the rails.
19. Carefully exert even pressure on both sides of the storage enclosure front and continue insertion all the way into the
rack until it locks in the storage position. Do not force insertion, which could damage the rails.
20. Secure the storage enclosure chassis flanges to the rack cabinet, fastening the top captive thumbscrew on each side
until tight.

Replace a SAS expander module

Each of the eight (8) SAS expander modules provides power and high-speed signal connection to its associated 24-
HDD baseplane through a SAS riser sideplane.
An important feature of the storage enclosure design is redundancy. The SAS expander modules provide an extra layer
of fault tolerance for data paths to the main bay disk drives. You can still maintain continuous operation during the
replacement of a single SAS expander module for up to eight (8) minutes.
CAUTION If you remove any FRU while the storage enclosure is powered up, you must replace it with a known
good spare within the allotted time for that FRU. If you do not replace the FRU and, when applicable, close the related
cover within the identified time limit, you void the product warranty and the storage enclosure might overheat, causing
equipment failure and possible data loss.
To remove and replace a SAS expander module:
1. If you plan on removing all SAS expander modules, properly shut down the storage enclosure.
2. Retrieve the new SAS expander module in its static-protected container, ready to access and use it upon removal of
the faulty one.
3. (Optional) As an extra safety measure while installing disk drives, support the storage enclosure with a mechanical
lift to avoid any potential issues caused by downward forces.
4. Facing the front of the rack cabinet, loosen the storage enclosure chassis flanges by twisting the top captive
thumbscrew on each side of the storage enclosure to the left.
5. Lower the pull handles then gently and steadily pull the storage enclosure out on its rails until it locks in the service
position.
6. After locating the main bay cover's front or rear latch, depending on the location of the SAS expander module you
need to replace, push on the tab, release it by pressing the latch away from the front or rear panel and toward the
hinge, then resting the open half of the cover on the closed half.
Chapter 7 In-service field maintenance
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