HP StorageWorks 2000 Series Reference Manual page 88

On Volume Management pages, the Volume Menu panel shows a color-coded "map"
of the space used by each volume in the selected virtual disk. The color codes are:
Gray – Free space
Green – Standard volume
Blue – Snap pool
Orange – Master volume
Yellow – Snapshot
The panel also shows a table with information about each volume and the amount of
free space. The information that is shown varies, depending on the page.
For an explanation of sizes represented by various units, see "Size
Representations in SMU" on page 27.
You can change the name of a volume. This does not affect the target ID or LUN
values of the volume.
To change a volume name:
1. Select Manage > Volume Management > Volume Menu > Change Volume Name.
For each virtual disk, the virtual disk panel shows a status icon; the name, RAID
level, size, number of disk drives, and number of volumes; and utility status, if any.
2. Select a virtual disk.
The selected virtual disk's volume names, sizes, and types are displayed, and the
amount of free space.