Guidelines For Xp External Storage Operations - HP StorageWorks XP24000 User Manual
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- User manual (117 pages) ,
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- Reference manual (456 pages)
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Table 1 XP External Storage Requirements (continued)
Item
Maximum number of mapping paths can
be set for one external volume
Maximum capacity of an external volume
Minimum capacity of an external volume
Maximum number of external volume
groups
Maximum number of external volumes
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.
Make sure that an external volume is accessed only from the local storage system side once
the external volume is mapped.
◦
Make sure that the external volume, which has been mapped as an internal volume, is
not accessed from the host that is connected to the external storage system.
◦
Make sure that the external volume, which has been mapped as an internal volume, is
not manipulated by the copy function or other function of the external storage system.
◦
If you need to access the mapped external volumes from the external storage system,
perform the operation explained in
Disconnecting External Volume" (page
Hosts can access the external storage system volumes that have not been mapped as the
internal volumes. There is no restriction.
HP Confidential
Requirement
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
8
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.
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
16,384
4,096
"Disconnecting External Storage System or
87).
Guidelines for XP External Storage Operations
37
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