The Fibre Channel hubs and switches, if installed, must be powered on before the host to
insure proper loop initialization.
The power up procedure includes the following steps:
1. Turn on the expansion enclosures.
2. After the last enclosure was powered on, wait for all the disks to be ready (steady green
LED for each disk).
3. Turn on hubs/switches (if attached).
4. Turn on the DS4000 storage server.
5. Turn on the host application server.
The power-down procedure includes the following steps:
1. Turn off the host application server.
2. Turn off the DS4000 storage server.
3. Turn off hubs/switches (if attached).
4. Turn off the expansion enclosures
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