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Replacing a filter and filter retainer
Note: Inspect the filter as needed. Replace the filter every three months or sooner,
depending on your environment.
Complete the following steps to replace a filter and filter retainer:
1. Remove the bezel by grasping the sides of the bezel and pulling it slowly
toward you, as shown in Figure 109 on page 150.
2. Place the bezel face down on a level surface.
3. Remove the filter retainer and filter from the bezel by pressing the blue tabs
toward the edge of the bezel.
4. Flip the filter retainer over and remove the filter.
5. Remove the new filter from the packaging materials and carefully place it in the
filter retainer.
Note: Make sure the filter is fitted under all the holding tabs on the filter
retainer frame.
6. Flip the filter retainer over, line it up with the bezel opening and slightly push the
retainer into place.
7. Grasp the sides of the bezel and snap it onto the DS4700 Express chassis, as
shown in Figure 109 on page 150.
Working with hot-swap E-DDMs
This section explains how you can increase the storage subsystem capacity by
adding more E-DDMs or by replacing existing E-DDMs with ones that have a larger
capacity.
Before you begin, complete the following tasks:
v Read the safety and handling guidelines in “Safety” on page xv and in “Handling
static-sensitive devices” on page 33.
v Ensure that your current system configuration is working properly.
v Back up all important data before you make changes to data storage devices.
Before you install or remove E-DDM CRUs, review the following information:
v Blank trays: A storage subsystem without a full set of E-DDMs (16) contains
blank trays in the unused drive bays. Before installing new E-DDMs, you must
remove these empty trays. Save the empty trays for future use. Each of the 16
bays must always contain either a blank tray or a hot-swap E-DDM.
For proper cooling and EMC protection, do not leave a drive slot open without
either a drive blank or a E-DDM CRU inserted.
v E-DDM CRUs:
– The DS4700 Express Storage Subsystem supports 2 or 4 Gbps fibre channel
and SATA E-DDMs. The Link Rate setting speed must be set accordingly. See
“Verifying the Link Rate setting ” on page 161 for more information.
– When adding E-DDM CRUs, if you are not installing all 16 E-DDM CRUs into
the storage subsystem, install the E-DDM CRUs from left to right
consecutively.
Chapter 5. Replacing components 151