EMC 300-000-978 REV A03 User Manual

powercf Configuration Utility

During system boot on Solaris hosts, the 

powercf

 utility configures 

PowerPath devices by scanning HBAs for both single-ported and 
multiported storage system logical devices. (A multiported logical 
device shows up on two or more HBAs with the same storage system 
subsystem/device identity. The identity comes from the serial 
number for the logical device.) For each storage system logical device 
found in the scan of the HBAs, 

powercf

 creates a corresponding 

emcpower device entry in the 

emcp.conf

 file, and it saves a primary 

path and an alternate primary path to that device.

After PowerPath is installed, you need to run 

powercf

 only when the 

physical configuration of the storage system or the host changes. 
Configuration changes that require you to reconfigure PowerPath 
devices include the following:

◆

Adding or removing HBAs

◆

Adding, removing, or changing storage system logical devices

◆

Changing the cabling routes between HBAs and storage system 
ports

◆

Adding or removing storage system interfaces

Refer to Reconfiguring PowerPath Devices Online on page 5-10 for 
instructions on reconfiguring PowerPath devices on Solaris.

The 

powercf

utility resides in the 

/etc

 directory.

You must have superuser privileges to use 

powercf

.

To run 

powercf

 on a Solaris host, type the command, plus any 

options, at the shell prompt.

The 

/kernel/drv/emcp.conf

 file lists the primary and alternate path 

to each storage system logical device and the storage system device 
serial number for that logical device. The 

powercf -q

 command 

updates the existing 

emcp.conf

 file or creates a new one if it does not 

already exist.

powercf -q|-Z