IBM 3531 Preparing the expansion unit, Removing CRUs, Statement, Use safe practices when lifting

You will need a flat-blade screwdriver and a Phillips-head screwdriver to install your expansion unit. Each type of enclosure comes with general installation instructions for installing optional devices.

Before you begin, review the following assumptions:

•If you are installing the expansion unit in a rack, you have already installed the other components in the rack and moved the rack to its permanent operating location.

•You have already installed and configured the host controllers and appropriate host adapters.

•There are 68-pin VHDCI SCSI cables attached to the host controllers, ready for final connection to the expansion unit.

•The installation site meets all area, environmental, power, and site requirements for the expansion unit. Refer to the expansion unit requirements listed under “Operating specifications” on page 5.

Preparing the expansion unit

This section explains how to remove the CRUs and set the interface options to prepare the expansion unit for installation.

Removing CRUs

It is easier to lift the expansion unit and install it in a rack or tower enclosure if you remove all CRUs (disk drives, power supplies, and ESMs) first. A fully loaded expansion unit with 14 disk drives and two power supplies with built-in fans installed weighs 36.1 kg (79.5 lb). The standard unit with two power supplies weighs 22.5 kg (49.5 lb). If you remove all the CRUs, you can reduce the overall weight.

Attention: If you have data stored on the drives, label the drives before you remove them. Then, when you replace the drives, install each one in the same drive bay from which you removed it.

See “Locations” on page 8 for information on removing the CRUs.

Statement 4

≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs)

CAUTION:

Use safe practices when lifting.

Netfinity EXP300 Type 3531 9