Lenovo ThinkSystem DE Series Manual page 75

shelf depend on whether the volumes in the drawer are protected by Drawer Loss Protection. If all
volumes in the drive drawer are in disk pools or volume groups that have Drawer Loss Protection,
you can perform this procedure online. Otherwise, you must stop all host I/O activity and power off
the shelf before replacing the drive drawer.
5.4.2. Before you begin
• Review the drive drawer requirements in
replacement.
• Make sure the drive shelf meets all of these conditions:
◦ The drive shelf cannot be over temperature.
◦ Both fans must be installed and have a status of Optimal.
◦ All drive shelf components must be in place.
◦ The volumes in the drive drawer cannot be in a Degraded state.

Possible loss of data access — If a volume is already in a Degraded
state, and you remove drives from the drive drawer, the volume can fail.
What you'll need
• A replacement drive drawer.
• An ESD wristband, or you have taken other antistatic precautions.
• A flashlight.
• A permanent marker to note the exact location of each drive as you remove the drive from the
drawer.
• A management station with a browser that can access ThinkSystem System Manager for the
controller. (To open the System Manager interface, point the browser to the controller's domain
name or IP address.)
5.4.3. Step 1: Prepare to replace drive drawer
Determine if you can perform the replacement procedure while the drive shelf is online or if you
need to stop host I/O activity and power off any of the shelves that are powered on.
If you are replacing a drawer in a shelf with Drawer Loss Protection, there is no need to stop host
I/O activity and power off any of the shelves.
Steps
1. Determine if the drive shelf is powered on.
◦ If the power is off, you do not need to issue the CLI command. Go to
chains.
◦ If the power is on, go to the next step.
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Requirements for DE2000H or DE4000H drive
Step 2: Remove cable