Product data

Disk Drive Modules and Dummy Disk Drive Modules
Note: A disk drive module is one FRU. Always exchange it as a complete FRU.
Removing a Module
Attention:
v Disk drive modules are electrostatic-discharge (ESD) sensitive. Use the tools and
procedures defined by your organization to protect such parts. See also “Electrostatic
Discharge” on page xi.
v Disk drive modules are fragile. Handle them with care, and keep them well away
from strong magnetic fields.
v Any slot that has no disk drive module installed must contain a dummy disk drive
module. The dummy module ensures that the correct airflow is maintained around
the disk drive modules in the other slots. If a slot remains empty, overheating might
occur.
Notes:
1. Unless you have a particular reason to do so, do not switch off the using system or
the 2104 when removing disk drive modules or dummy disk drive modules.
2. The diagrams in these instructions show a 2104 Model DU3. The procedure for a
2104 Model TU3 is the same, except that everything is turned through 90 degrees.
Step 1. If you are removing a module from a 2104 Model TU3, open the front cover
(see “Cover” on page 68), if not already done.
Step 2. If you are removing a dummy disk drive module, go to step 3 on page 76.
Otherwise, go to step 7 on page 77.
Chapter 3. Removal and Replacement Procedures 75