EMC CLARiiON CX700, Hardware Reference Manual

Page: 53 / 114

CX700 Powerdown
2-23
Setting Up and Starting a CX700 System
4. In the cabinet/rack, set the master switches (main circuit breaker
switches on some older cabinets) to the on position.
The CX700 and any DAEs in the cabinet will power up.
Once the CX700 is powered up, it boots and begins the initialization
process. For instructions on how to initialize your system after its first
powerup, refer to the
CX700 2-Gigabit Fibre Channel Storage Processor
Enclosure (SPE) Setup Guide and the EMC Installation Roadmap for
CX-Series, AX-Series, and FC-Series Storage Systems.
CX700 Powerdown
If a CX700 with ac power powers down abnormally (for example, at a
brownout or ac failure), the SPS ensures that any data in the
storage-system cache is saved to the storage-system vault disks.
However, when the CX700 is powered back up, it may take longer to
come on line.
Turning Off the Power - ac Systems
Follow these instructions to power down CX700 storage systems with
ac power. For instructions on powering down dc-powered storage
systems, go to
Turning Off the Power - dc Systems on page 2-24.
1. Stop all I/O activity to the CX700 SPE.
Stopping the I/O allows the SP to destage cache data, and may take some
time. The length of time will be based on criteria such as the size of the
cache, the amount of data in the cache, the type of data in the cache, and
the target location on the disks, but it is typically less than one minute.
2. If the server connected to the CX700 is running the UNIX
®
operating system, unmount file systems.
3. Use the power switch on each SPS to turn off power. See
Figure 2-18. This turns off power to the CX700 and the first DAE.
You do not need to turn off power to the other connected DAEs.