HP XP External Storage Software - Manual (Page 46)

Figure 19 Example of External Volume of 2 TB or Less
• You cannot access the data that is stored in the field over the maximum capacity of the external
volume.
The maximum volume capacity differs depending on the emulation type that you specify at the
external volume mapping. See “ Required Volume Capacity for Each Emulation Type ” on page 127
for more details.
• When an external volume is mapped as internal volume(s) with the setting of the emulation type
other than OPEN-V, the number of volumes and the volume capacity of the mapped external
volume(s) depend on the capacity of the original external volume and the basic capacity of each
emulation type. When an external volume is mapped with the setting of emulation type other
than OPEN-V, the data management information area is required to be provided in the mapped
volume. This means that the capacity that can be used after the mapping becomes smaller
than the actual external volume capacity. The available capacity decreases as much capacity
as the data management information area.
Figure 20 on page 46 shows an example of the case that the original capacity of the external
volume is bigger than the basic capacity of the emulation type. In Figure 20 on page 46, the
emulation type is OPEN-3. Figure 21 on page 47 shows an example of the case that the original
capacity of the external volume is smaller than the basic capacity of the emulation type.
Figure 20 When the External Volume Capacity is Bigger than the Basic Capacity of
Specified Emulation Type (Example of the OPEN-3 emulation type)
46 Preparing for External Storage Operations