Lenovo ThinkSystem DE Series Manual page 78

c. Turn off both power switches on the drive shelf.
d. Wait two minutes for drive activity to stop.
5.4.4. Step 2: Remove cable chains
Remove both cable chains so you can remove and replace a failed drive drawer.
About this task
Each drive drawer has left and right cable chains. The left and right cable chains allow the drawers
to slide in and out. The metal ends on the cable chains slide into corresponding vertical and
horizontal guide rails inside the enclosure, as follows:
• The left and right vertical guide rails connect the cable chain to the enclosure's midplane.
• The left and right horizontal guide rails connect the cable chain to the individual drawer.
Possible hardware damage — If the drive tray is powered on, the cable chain is

energized until both ends are unplugged. To avoid shorting out the equipment, do
not allow the unplugged cable chain connector to touch the metal chassis if the
other end of the cable chain is still plugged in.
Steps
1. From the rear of the drive shelf, remove the right fan canister:
a. Press the orange tab to release the fan canister handle.
The figure shows the handle for the fan canister extended and released from the orange tab
on the left.
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