HP P9000 External Storage for Open and Mainframe Systems User Guide (AV400-96392, October 2011)

Table 3 When the emulation type of the external volume is for Mainframe (continued)
HDD typeApplication
SATASAS/FC/Flash Drive
(Journal, Check points)
Not SupportedNot SupportedOperation from TPF
Not RecommendedOKFile Operation from Host
(Both of Read and Write)
OKOKFile Operation from Host
(Mainly Read)
RecommendedOKBackup
RecommendedOKArchive
Capacity guidelines
• When a volume, which has a capacity of 4 TB or less, in the external storage system (external
volume) is mapped with an OPEN-V emulation type, the volume is defined as an internal virtual
volume that has the same capacity as the mapped external volume.
Figure 17 Example of an external volume of 4 TB or less
• You cannot access data that is stored in the volume 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.
• When an external volume is mapped as internal virtual volumes with an emulation type other
than OPEN-V, the number of volumes and the volume capacity of the mapped external volumes
depend on the capacity of the original external volume and the basic capacity of each
emulation type. When an external volume is mapped with an 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 18 (page 35) shows an example of the case that the original capacity of the external
volume is bigger than the basic capacity of the emulation type. The emulation type is OPEN-3.
Figure 19 (page 35) shows an example of the case that the original capacity of the external
volume is smaller than the basic capacity of the emulation type.
34 Prerequisites