IBM Midrange System DS4000 Series Hardware Manual page 188

To accomplish this task, perform these steps:
1. To rename the DS5000 storage subsystem, from the Devices view of the Enterprise
Management window, right-click the subsystem to rename and select Storage
Subsystem  Rename.
The other option is to select the Name/Rename Storage Subsystem option in the Setup
view of the Enterprise Management window, as shown in Figure 4-33.
Figure 4-33 Initial Setup Tasks: Name or rename a storage system
2. Type in the name you want to assign to your storage subsystem (there is a 30-character
limit). All leading and trailing spaces are deleted from the name. Use a unique, meaningful
naming scheme that is easy to understand and remember. You can also assign a
comment to facilitate its identification.
3. Click OK to finish the name assignment.
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IBM Midrange System Storage Hardware Guide