IBM DS4700 manual Replacing a filter and filter retainer, Working with hot-swap E-DDMs, DDM CRUs

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:

vRead the safety and handling guidelines in “Safety” on page xv and in “Handling static-sensitive devices” on page 33.

vEnsure that your current system configuration is working properly.

vBack up all important data before you make changes to data storage devices.

Before you install or remove E-DDM CRUs, review the following information:

vBlank 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.

vE-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