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Table 3 When the Emulation Type of the External Volume is for Mainframe
HDD TypeApplication
SATAFC/SSD
Not RecommendedNot RecommendedDatabase
Online Transaction Processing (OLTP)
Not RecommendedNot RecommendedSystem Volumes
(Journal, Check points)
Not SupportedNot SupportedOperation from TPF
Not RecommendedYesFile Operation from Host
(Both of Read and Write)
YesYesFile Operation from Host
(Mainly Read)
RecommendedYesBackup
RecommendedYesArchive
Capacity Guidelines
• When a volume, which has the capacity of 4 TB or less, in the external storage system (external
volume) is mapped with the setting of OPEN-V emulation type, the volume is defined as the
internal volume that has the same capacity as the mapped external volume.
Figure 19 Example of External Volume of 4 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”
(page 152) for more details.
• When an external volume is mapped as internal volumes with the setting of the 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 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
40 Preparing for XP External Storage Operations