Unexpected disconnection of the OceanStor V3 HyperMetro pair


Refer to Revelations of Troublesolving cases on the right.

Other related questions:
Configuring the HyperMetro feature for V3 series unified storage systems
If the HyperMetro feature is configured, two data centers serve as a backup for each other. If one data center fails, services are automatically switched to the other data center without data loss or service interruption. For the procedure of configuring the HyperMetro feature, see http://support.huawei.com/enterprise/docinforeader.action?contentId=DOC1000084209&idAbsPath=7919749|7941815|21430818|21462748|21041235.

6900 V3 remote replication specifications
OceanStor 6900 V3 remote replication specifications are as follows: Maximum number of remote replication pairs (synchronous + asynchronous): 2048 Maximum number of secondary LUN in each pair: 1 (synchronous) or 2 (asynchronous) Maximum number of connected remote storage devices: 32 Maximum number of remote replication consistency groups: 512 Maximum number of members in a remote replication consistency group: 512 For detailed specifications, see V3R1 Latest Software Specifications.

Introduction to the Dorado HyperMetro feature
HyperMetro creates active-active relationships between two data centers so that both the data centers are running and carry the same host services concurrently. A mutual backup relationship is set up between the storage arrays in the two data centers. If the storage array in one data center malfunctions, the storage array in the other data center automatically takes over services without data loss or service interruption, improving the data center serviceability and system resource utilization.

Dorado HyperMetro network
A logical HyperMetro network topology shows the mapping relationship and data flows between host applications and storage arrays. For details, see: HyperMetro Solution Overview.

Reason for the automatic disconnection between an OceanStor V3 storage system and HP-UX 11i v2 host
If no I/O interaction is performed within approximately one minute, the connection between an OceanStor V3 storage system and HP-UX 11i v2 host is automatically interrupted. On the management page of the storage system, you can see that the host initiator is in the disconnected status. If no I/O is involved in the follow-up operations, the connection between the storage system and host is set up again. This disconnection problem occurs due to the control mechanism of the HP-UX operating system and does not affect services.

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