Installing a ModuleAttention: Disk drive modules are fragile. Handle them with care, and keep them well away fromstrong magnetic fields. Any slot that has no disk drive module installed must contain a dummy disk drivemodule. The dummy module provides continuity of the SSA string, and ensures thatthe correct airflow is maintained around the disk drive modules in the other slots.Notes:1. Unless you have a particular reason to do so, do not turn off the using system or the7133 when installing disk drive modules.| 2. The diagrams in these instructions show a 7133 Model 010. The procedure for| Models 020, 500, and 600 is the same, except that for Models 500 and 600,| everything is turned through 90 degrees.1 If you are reinstalling a disk drive module and the covers of the 7133 have notbeen reinstalled since you removed that module, or if you are installing an exchangedisk drive module, go to step 5 on page 3-24. Otherwise, go to step 2.If you installing a disk drive module into a spare slot, go to step 2.2 If not already done: Open the front cover (see “Covers” on page 3-2) if you are installing a disk drivemodule into the front of the 7133. Open the back cover (see “Covers” on page 3-2) if you are installing a disk| drive module into the back of a Model 500 or Model 600.3 If you are installing a disk drive module into a spare slot, go to step 4 on page 3-23.Otherwise, go to step 5 on page 3-24.3-22 7133 Service Guide

IBM 7133 Series Service Manual