IBM DS8900F Introduction And Planning Manual page 100

Table 42. Feature codes for the overhead cable (top-exit bracket)
Feature Code
1401
Overhead cabling installation and safety requirements
Ensure that installation and safety requirements are met before your storage system is installed.
If the cables are too long, there is not enough room inside of the rack to handle the extra length and
excess cable might interfere with the service process, preventing concurrent repair. Consider the
following specifications and limitations before you order this feature:
• In contrast to the raised-floor power cords, which have a length from the tailgate to the connector of
about 4.9 m (16 ft), the length of the top exit power cords are only 1.8 m (6 ft) from the top of the
storage system.
• Product safety requirements restrict the servicing of your overhead equipment to a maximum of 3 m (10
ft) from the floor. Therefore, your power source must not exceed 3 m (10 ft) from the floor and must be
within 1.5 m (5 ft) of the top of the power cord exit gate. Servicing any overhead equipment higher than
3 m (10 ft) requires a special bid contract. Contact your technical service representatives for more
information on special bids.
• To meet safety regulations in servicing your overhead equipment, you must purchase a minimum of one
feature code 1101 for your top exit bracket feature per site. This feature code provides a safety-
approved 5-foot ladder. This ladder provides technical service representatives the ability to perform
power safety checks and other service activities on the top of your storage system. Without this
approved ladder, technical service representatives are not able to install or service a storage system
with the top-cable exit features.
• To assist you with the top-exit host cable routing, feature code 1400 provides a cable channel bracket
that mounts directly below the topside of the tailgate and its opening. Cables can be easily slid into the
slots on its channels. The cable bracket directs the cables behind the rack ID card and towards the rear,
where the cables drop vertically into a second channel, which mounts on the left-side wall (when
viewing the storage system from the rear). There are openings in the vertical channel for cables to exit
toward the I/O enclosures.
Accommodating cables
You must ensure that the location and dimensions of the cable cutouts for each frame in the storage
system can be accommodated by the installation location. An overhead-cable management option (top-
exit bracket) is available for DS8900F for environments that have special planning and safety
requirements.
Use the following steps to ensure that you prepare for cabling for each storage system:
1. Based on your planned storage system layout, ensure that you can accommodate the locations of the
cables that exit each frame. See the following figure for the cable cutouts for the DS8900F.
86 IBM DS8900F: DS8900F Introduction and Planning Guide
Description
Top-exit bracket for fiber cable