Table 1 XP External Storage Requirements
Item | Requirement |
|
|
Maximum number of ports in the | 1,024 per port |
connected external storage system |
|
(WWN is used as a port identification |
|
number |
|
|
|
Maximum number of external volumes | 63,232 volumes can be connected. |
that can be connected | 4,096 volumes can be connected per port. |
| |
| If you use XP Snapshot or XP Thin Provisioning, the number of |
| external volumes that can be connected is as follows: |
| Number of external volumes + Number of virtual volumes |
| 63,232 |
|
|
Maximum number of mapping paths can | 8 |
be set for one external volume |
|
|
|
Maximum capacity of an external volume | 4 TB per external volume |
| If you specify an external volume that is more than 4 TB you can |
| access the data stored in the field up to 4 TB. You cannot access |
| the data that is stored in the field over 4 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 |
| the minimum capacity becomes 96,000 blocks (about 47 MB) |
| per external volume |
|
|
Maximum number of external volume | 16,384 |
groups |
|
|
|
Maximum number of external volumes | 4,096 |
that can be registered in one external |
|
volume group |
|
|
|
Guidelines for XP External Storage Operations
This section provides guidelines for the XP External Storage operations.
Mapping Guidelines
•Before mapping external volumes, make sure that external volumes are not reserved by a host. External volumes that are reserved by a host cannot be mapped as internal volumes.
If external volumes are reserved by a host, cancel the reserve settings and then map the external volumes.
•Once external volumes are mapped, do not reserve the external volumes for a host.
If external volumes are reserved by a host, internal volumes to which the external volumes are mapped will be blocked.
38 Preparing for XP External Storage Operations