Lenovo DM120S, Installation And Cabling Manual, Page: 15 / 70

When installing DM600S disk shelves, remove the power supplies and I/O modules (IOMs) to make
the disk shelf lighter and easier to maneuver.
Step 3. If you are installing a DM600S disk shelf, install the components into the racked disk shelf;
otherwise, go to the next step.
If you purchased a partially populated disk shelf which does not have a drive in every drive slot, you
must ensure that:
• The first four slots (0, 3, 6, and 9) are occupied in each drawer. This ensures proper airflow in the
disk shelf.
• In a shelf with 30 drives, the remaining ten drives are distributed evenly throughout the shelf in
slots 1 and 10 of each drawer.
The following illustration shows how the drives are numbered from 0 to 11 in each drive drawer
within the shelf. In a shelf containing 30 drives, slots 0, 1, 3, 6, 9, and 10 must contain drives.
a. Reinstall any power supplies and IOMs you removed prior to installing your disk shelf into the
rack.
b. Open the top drawer of the shelf.
c. Raise the cam handle on the drive to vertical.
d. Align the two raised buttons on each side of the drive carrier with the matching gap in the drive
channel on the drive drawer.
1 Raised button on the right side of the drive carrier
Chapter 2
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Hot-adding disk shelves with IOM12 modules
11