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Step 8. Use the Set Service Mode service aid to put into Service mode the disk drive
module that you are removing (see the chapter about SSA service aids in the
user or maintenance information for your using-system SSA attachment
hardware).
Note: You can put into Service mode only disk drive modules that are in a
closed SSA loop or at the end of an SSA string. Only one disk drive
module at a time can be in Service mode.
If you are removing several disk drive modules at the same time:
a. Choose any one of the disk drive modules that you are going to
remove.
b. Put that disk drive module into Service mode.
c. Remove the disk drive module, as described in steps 9 through 17.
d. Reset Service mode.
e. Attention: When you remove the remainder of the disk drive
modules, remove each module only when the slot that is next to it
becomes empty.
Repeat this procedure for one disk drive module at a time,
ensuring that you always remove a module that is next to an
empty slot.
Step 9. Refer to Figure 74.
2
Figure 74. Removing the Lock from a Module (1)
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Chapter 3. Removal and Replacement Procedures
151
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