Table 3 When the Emulation Type of the External Volume is for Mainframe

Application

HDD Type

 

 

 

 

 

FC/SSD

SATA

 

 

 

Database

Not Recommended

Not Recommended

Online Transaction Processing (OLTP)

 

 

 

 

 

System Volumes

Not Recommended

Not Recommended

(Journal, Check points)

 

 

 

 

 

Operation from TPF

Not Supported

Not Supported

 

 

 

File Operation from Host

Yes

Not Recommended

(Both of Read and Write)

 

 

 

 

 

File Operation from Host

Yes

Yes

(Mainly Read)

 

 

 

 

 

Backup

Yes

Recommended

 

 

 

Archive

Yes

Recommended

 

 

 

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