Product manual

CDA 7 Product Manual

A-2 77 A1 69UP Rev00

4. When the IML procedure completes (all directors show "0F" in their LED

displays on their front panels), place the operator panel switches (channel

director and disk director) in their enable position.

When "0F" clears from all director LED displays, the CDA 7 is then available

to the host system(s).

A.2 Routinely Powering Down CDA

Perform these steps to power off the CDA 7 using the AC power switch.

1. Stop all processes to the CDA 7.

2. Watch the operator panel and wait for all "Active" LEDs to stop flashing.

NOTE:

The displays stop flashing when the CDA 7 has written all cache data to disk.

3. Press the AC power switch on the rear door to the down (O) position.

NOTE:

The battery backup system automatically turns on when the CDA 7 detects loss

of AC power. The battery will keep the CDA 7 powered for 3 minutes following

which CDA 7 turns off.

A.3 Emergency Powering Down

If it becomes necessary to power off the CDA 7 immediately:

• Press the red EPO switch on the rear door to the down (O) position.

NOTE:

CDA 7 immediately switches to backup battery power and destages any pending

writes in cache to disk. This destage operation takes approximately 20 seconds

following which CDA 7 powers down.

IMPORTANT:

When there is an emergency power cut, data in the cache might not be

saved on the physical disks.