HP XP External Storage Software - Manual (Page 44)

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