Red Hat DEVICE-MAPPER MULTIPATH 5.2 Uživatelský manuál stáhnout pdf (Strana 13)

DotHill – Linux Device Mapper Multipath “How To” for Storage Revision 4

devices {

device {

vendor "DotHill"

product "SANnet II FC"

path_grouping_policy multibus

failback immediate

}

device {

vendor "DotHill"

product "R/Evo 2730-2R"

path_grouping_policy failover

failback 25

}

6.3.4 Per-device settings (multipaths)

The per-device settings specify one or more devices by WWID. These settings apply only to the

devices of a specific WWID value. This gives the user an opportunity to customize the behavior

of DM-MP for each storage resource. One useful feature is the ability to specify a customized

alias for a device. Since the association between the WWID and the storage resource is

permanent, a alias assigned by this method can never change. For example, the following multi-

paths section assigns names of “myspace” and “yourspace” to two of the storage resources:

multipaths {

multipath {

wwid 3600c0ff000000000023432491536d600

alias myspace

failback manual

}

multipath {

wwid 3600c0ff0000000000234320d5321e101

alias yourspace

failback 45

}

This sets the aliases of the multipath devices to my chosen names rather than the default user-

friendly names of the mpathn format.

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Red Hat DEVICE-MAPPER MULTIPATH 5.2 Uživatelský manuál Strana 13