EMC 300-000-978 REV A03 manual Device Naming

PowerPath Administration on Solaris

Pseudo (emcpower) devices offer the following advantages:

◆There is only one pseudo device name for each multipathed logical device. (There are multiple native device names for each multipathed logical device, which is harder to manage.)

◆Pseudo device names are easier to manage because there is a one-to-one relationship between pseudo device names and logical volumes. (Native device names are based on HBA, target, and device assignments as recognized at system startup.)

◆Implementing PowerPath’s boot-time, boot-path failover feature requires pseudo devices.

◆Operations of Sun Microsystem’s Dynamic Reconfiguration (DR) feature are transparent to applications using pseudo devices. (With native devices, these operations are not transparent: c#t#d#s# paths are removed, which can be disruptive to applications using those paths.) Refer to Dynamic Reconfiguration on page 5-12 for information on using DR to add and remove HBAs in a PowerPath environment.

Device Naming 5-7

5