Dell PowerVault MD3600i Manual do Proprietário descarregar pdf (Página 107)

Configuration: About Your Host 107

I/O Data Path Protection

You can have multiple host-to-array connections for a host. Ensure that you

select all the connections to the array when configuring host access to the

storage array.

NOTE: See the Deployment Guide for more information on cabling configurations.

NOTE: For more information on configuring hosts see "Configuration: About Your

Host" on page 99.

If a component such as a RAID controller module or a cable fails, or an error

occurs on the data path to the preferred RAID controller module, the virtual

disk ownership is moved to the alternate non preferred RAID controller

module for processing. This failure or error is called failover.

Drivers for multi-path frameworks such as Microsoft Multi-Path IO (MPIO)

and Linux Device Mapper (DM) are installed on host systems that access the

storage array and provide I/O path failover.

For more information on Linux DM, see "Configuration: Device Mapper

Multipath for Linux" on page 195. For more information on MPIO, see

microsoft.com.

NOTE: You must have the multi-path driver installed on the hosts at all times, even

in a configuration where there is only one path to the storage system, such as a

single port cluster configuration.

During a failover, the virtual disk transfer is logged as a critical event, and an

alert notification is sent automatically if you have configured alert

destinations for the storage array.

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Dell PowerVault MD3600i Manual do Proprietário Página 107