Dot Hill Systems II 200 FC service manual Powering Off the Array

4.17Powering Off the Array

You might need to power off the array (both power supplies) if you relocate the array or perform certain maintenance procedures with associated servers. Always shut down the array’s controller before powering off the array.

Caution – If controllers are not shut down from the firmware application or the SANscape CLI before an array is powered off, data that is written to cache and that has not been completely written to the disks will be lost.

To power off an array, perform the following steps.

1.Stop all I/O activity to the array.

2.Shut down the controller with one of the following commands:

■Firmware application Shutdown Controller command (system Functions → Shutdown controller)

■SANscape CLI shutdown controller command

These commands first halt all I/O activity, and then write the contents of cache to the drives.

3.Power off both power supply/fan modules.

See “Power-On Sequence” on page 4-32for information about turning the array back on.

Chapter 4 Connecting Your Array 4-33