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Guidelines for external storage operations, Mapping guidelines, Recommended applications according to the hdd type – HP XP External Storage Software User Manual

Page 44: 2 external storage requirements

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Table 2 External Storage Requirements

Item

Requirement

Maximum number of ports in the

connected external storage system

(WWN is used as a port identification

number)

1,024 per port

Maximum number of external volumes

which can be connected

63,232 volumes can be connected.
4,096 volumes can be connected per port.

Note:

If you use XP Snapshot or HP StorageWorks XP Thin

Provisioning Software, the number of external volumes which

can be connected is as follows:
Number of external volumes + Number of virtual volumes ≤

63,232

Maximum number of mapping paths

can be set for one external volume

8

Maximum capacity of an external

volume

2 TB per external volume
If you specify an external volume which is more than 2 TB you

can access the data stored in the field up to 2 TB. You cannot

access the data that is stored in the field over 2 TB.

Minimum capacity of an external volume

77,760 blocks (about 38 MB) per external volume.
However, when the emulation type of the volume is OPEN-V,

the minimum capacity becomes 96,000 blocks (about 47 MB)

per external volume

Maximum number of external volume

groups

16,384

Maximum number of external volumes

which can be registered in one external

volume group

4,096

Guidelines for External Storage Operations

Guidelines for the External Storage operations are as follows:

Mapping Guidelines

Make sure that you do not access the external volume, which has been mapped as a storage

system volume, from the host that is connected to the external storage system. Also make sure that

you do not access the mapped external volume using the function (for example, copy function) of

the external storage system. Once you have mapped an external volume as a storage system

volume, you have to access the mapped external volume only from the storage system side.

From the host, you can access the external storage system volumes that have not been mapped as

the storage system volumes. There is no restriction.

Do not map multiplatform volumes of external storage systems as internal volumes.

Recommended Applications according to the HDD Type

Table 3

on page 45 and

Table 4

on page 45 show the recommended level of the application of mapped

external volume according to the HDD type of the external volume.

44

Preparing for External Storage Operations

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