User`s guide

24 007-4522-003
1: Storage System Overview
Tower Enclosure Bay Numbering
The tower enclosure is 4 bays wide by 4 bays high, and the bays are numbered as follows:
• The disk drive bays, located in front, are numbered 1 to 4 from right to left and 1 to
4 from top to bottom. Drives in bays 1/1 and 4/4 are required for storage system
management; these bays must always be occupied.
• The rear bays are numbered 1 to 5 from top to bottom.
The location of a disk drive module is identified by combining the column and row
numbers (top and side numbers in Figure 1-18). For example, the disk drive in the upper
right corner of the enclosure is disk 1-1. A module located in the rear of the enclosure is
identified by its bay number. For example, the PSU/cooling module on the bottom of the
enclosure is in bay 5.
Figure 1-18 shows the correct positions of the modules and the enclosure bay numbering
convention for the tower.