2–10
Theory of Operation
2.2.3.2 DC Power Switches
Power switches for each ISE are on the lower front side of the storage
enclosure. The six switches on the left are for the front six ISEs and the
six switches on the right are for the rear six ISEs. Each power switch is
associated with a disk ISE position, as shown in Figure 2–2.
An indicator in each drive dc power switch lights to show that nominal
power is being applied to the associated disk ISE.
Press the dc power switch to connect power to the associated disk ISE.
This causes the disk ISE to spin up and run a self-test. After setting the
drive dc power switch, you must press the Ready button on the OCP to
bring the disk ISE on-line.
After pressing the ac power switch in the rear of the SF3x enclosure,
power is applied to the rear six ISEs first. Then after a 15-second delay,
power is applied to the front six ISEs.
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