Dell PowerVault 221S (SCSI) - Manual (Page 17)

Connecting and Operating Your Storage System: Dell PowerVault 220S and 221S Systems Installation and Troubleshooting Guide
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NOTE: If you have a redundant system, be sure to turn off the on/off switch on both power supplies..
2. Power down the attached servers.
3. Turn off the storage system.
4. Complete step step 5 through step step 11 in " Connecting the Storage System ."
Upgrading to a Redundant System
If you have a storage system with nonredundant EMMs and/or nonredundant power supplies, you can upgrade to a redundant
system by adding an EMM and/or power supply. See " Installing an EMM or SCSI Terminator Card " and " Replacing the Power
Supply " for more information.
Downloading Firmware
You can download firmware updates for your storage system enclosure using your array management software. For more
information on downloading firmware, see your array management documentation. If your operating system does not provide
array management software, see Dell's Support website at support.dell.com for available configuration utilities for your
operating system.
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