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Huawei SAN Storage Host Connectivity Guide for Windows

HUAWEI SAN Storage Host Connectivity Guide for Windows Servers
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Initiator

Initiator

Table 6-1 describes the key parameters of initiators.

Table 6-1 Key parameters of initiators

Parameter

Description

Example

Uses third-party multipath software

  • This parameter is displayed only after an initiator has been added to a host.
  • If LUNs have been mapped to a host before you enable or disable this parameter, restart the host after you configure this parameter.
  • You do not need to enable this parameter for a host with UltraPath.

Enabled

Switchover Mode

Path switchover mode

The system supports the following modes:

  • early-version ALUA: default value of Switchover Mode for an upgrade from an earlier version to the current version. Detailed requirements are as follows:
    • The storage system must be upgraded from V300R003C10 and earlier to V300R003C20 or V300R006C00SPC100 and later; from V300R005 to V300R006C00SPC100 and later; from Dorado V300R001C00 to Dorado V300R001C01SPC100 and later.
    • Before the upgrade, the storage system has enabled ALUA.
  • common ALUA: Detailed requirements are as follows:
    • The storage system version must be V500R007C00 and later, V300R003C20 and later, V300R006C00SPC100 and later, or Dorado V300R001C01SPC100 and later.
    • The OS of the host that connects to the storage system must be SUSE, Red Hat 6.X, Windows Server 2012 (using Emulex HBAs), Windows Server 2008 (using Emulex HBAs), or HP-UX 11i V3.
  • ALUA not used: does not support ALUA or HyperMetro. This mode is used when a host such as HP-UX 11i V2 does not support ALUA or ALUA is not needed.
  • Special mode: This is used when the OS of the host supports ALUA, but is not included in common ALUA mode. Detailed requirements are as follows:
    • The storage system version must be V500R007C00 and later, V300R003C20 and later, V300R006C00SPC100 and later, or Dorado V300R001C01SPC100 and later.
    • The OS of the host that connects to the storage system must be VMware, AIX, Red Hat 7.X, Windows Server 2012 (using QLogic HBAs), or Windows Server 2008 (using QLogic HBAs).
  

Special mode type

Determines which Special mode is used for path switchover. All special modes support ALUA. Detailed requirements are as follows:

  • Mode 0:
    • The storage system version must be V500R007C00 and later, V300R003C20 and later, V300R006C00SPC100 and later, or Dorado V300R001C01SPC100 and later.
    • The host and storage system must be connected using a Fibre Channel network.
    • The OS of the host that connects to the storage system must be Red Hat 7.X, Windows Server 2012 (using QLogic HBAs), or Windows Server 2008 (using QLogic HBAs).
  • Mode 1:
    • The storage system version must be V500R007C00 and later, V300R003C20 and later, V300R006C00SPC100 and later, or Dorado V300R001C01SPC100 and later.
    • The OS of the host that connects to the storage system must be AIX or VMware.
    • If HyperMetro is deployed, HyperMetro must work in load balancing mode.
  • Mode 2:
    • The storage system version must be V500R007C00 and later, V300R003C20 and later, V300R006C00SPC100 and later, or Dorado V300R001C01SPC100 and later.
    • The OS of the host that connects to the storage system must be AIX or VMware.
    • If HyperMetro is deployed, HyperMetro must work in local preferred mode.
  • Mode 3:
    • The storage system version must be V500R007C00 and later, V300R006C10SPC100 and later, or Dorado V300R001C01SPC100 and later.
    • The OS of the host that connects to the storage system must be Linux or Solaris.
    • HyperMetro must work in local preferred mode.

Mode 0

Path Type

In HyperMetro scenarios, the value can be either Optimal Path or Non-Optimal Path.

  • When HyperMetro works in load balancing mode, set the Path Type for the initiators of both the local and remote storage arrays to Optimal Path. Enable ALUA on both the host and storage arrays. If the host uses the round-robin multipathing policy, it delivers I/Os to both storage arrays in round-robin mode.
  • When HyperMetro works in local preferred mode, set the Path Type for the initiator of the local storage array to Optimal Path, and that of the remote storage array to Non-Optimal Path. Enable ALUA on both the host and storage arrays. The host preferentially delivers I/Os to the local storage array.

In non-HyperMetro scenarios, the value is Optimal Path.

Optimal Path

NOTE:
  • You must configure initiators according to the requirements of the specific OS that is installed on the host. All of the initiators added to a single host must be configured with the same switchover mode. Otherwise, host services may be interrupted.
  • After configuring an initiator's switchover mode, you must restart the host for the configuration to take effect.
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Updated: 2019-08-22

Document ID: EDOC1000150159

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