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OceanStor 2200 V3 and 2600 V3 Storage System V300R005 SmartVirtualization Feature Guide 07

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Expanding the Storage Space of an eDevLUN

Expanding the Storage Space of an eDevLUN

After services are running for a period, the original storage space of an external LUN may not meet storage requirements of service data. You must expand the storage space of the external LUN. After expanding the storage space of the external LUN, you must expand the storage space of the eDevLUN. In this way, application servers can use the storage space of the expanded external LUN by employing the eDevLUN.

Capacity Expansion Process

Before expanding storage capacity, learn about the capacity expansion process to ensure smooth capacity expansion.

Figure 7-1 shows the flowchart for expanding an eDevLUN.
Figure 7-1  Flowchart for expanding an eDevLUN

Table 7-13  eDevLUN expansion steps

Step

Description

Operation Path

Expand the external LUN.

Expand the external LUN to the desired capacity.

For details, see operation instructions for a heterogeneous storage system.

Refresh information about the remote LUN.

Refresh information about the remote LUN on the local storage system for the remote LUN to identify the capacity added to the corresponding external LUN on the heterogeneous storage system.

Data Protection > Remote Device > Details > Remote LUN > Refresh.

For details about the operation, see the DeviceManager online help.

Expand the eDevLUN.

Expand the eDevLUN and update its capacity to the new capacity of the corresponding external LUN.

Provisioning > Block Storage Service > LUN > Expand.

For details about the operation, see the DeviceManager online help.

Precautions

During capacity expansion, observe the capacity expansion precautions to ensure smooth capacity expansion.

  • Any eDevLUN used by snapshot, remote replication, or SmartMigration cannot be expanded.
  • eDevLUNs can only be fully expanded. The total capacity after expansion equals the remote LUN capacity.
  • To ensure data integrity, stop services on an eDevLUN before expanding it.
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Updated: 2018-12-29

Document ID: EDOC1000106155

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