Rorke Data Galaxy HDX2 GHDX2-2430S-24F4D - Manual (Page 94)

Chapter 4: Subsystem Connection and Operation
Subsystem Connection and Operation 4-27
4.6 Power Off Procedure
To power off the subsystem, please follow these steps:
NOTE:
When powering off the subsystem, please ensure that no time-consuming
processes, like a “logical drive parity” check or a “Media Scan,” are running.
Step 1. Stop I/O access to the system.
Use the software provided on the host computer to stop all I/O
accesses to the subsystem. Please refer to the documentation
that came with your application servers and operating systems.
Some operating systems may require “unmounting” disk
volumes (mapped LUNs) before powering off the array.
Step 2. Flush the cache.
Usually the cached writes will be distributed in a short time.
You may also use the “Shutdown Controller” firmware
function to flush all cached data. This prepares the RAID
subsystem to be powered down.
Step 3. Turn off the power.
Turn off the power switch at the rear panel of the RAID
subsystem. Once the RAID subsystem has been powered off,
other devices connected to the subsystem may be powered
down.