Powerpath Commands:

powercf

During installation on Solaris hosts, the powercf utility configures PowerPath devices by scanning the host adapter buses for both single-ported and multiported Symmetrix volumes. (A multiported volume shows up on two or more host bus adapters with the same Symmetrix subsystem/device identity. The identity comes from the serial number for the volume.) For each Symmetrix volume found in the scan of the host adapter buses, powercf creates a corresponding emcpower device entry in the emcp.conf file, and saves a primary path and an alternate primary path to that device. The powermt config command, run at boot time by init (1M), adds additional paths to the Symmetrix volume.

After PowerPath is installed, you only need to run the powercf command when the physical configuration of the Symmetrix or the host changes. The configuration changes that require you to reconfigure PowerPath devices include:• Adding or removing host bus adapters• Adding, removing, or changing Symmetrix logical devices• Changing the cabling routes between host bus adapters and Symmetrix ports• Adding or removing Symmetrix channel directors

powercf -i|p|q

Arguments

-iScans the host adapter buses for single-ported and multiported Symmetrix volumes. Compares those volumes with the PowerPath device entries in the emcp.conf file. Prompts you to accept or reject any addition or deletion of Symmetrix devices in the emcp.conf file.

-pScans the host adapter buses for single-ported and multiported Symmetrix volumes. Compares those devices with the emcpower entries in the emcp.conf file. Prints information on any inconsistencies.

-qScans the host adapter buses for single-ported and multiported Symmetrix volumes. Compares those volumes with the PowerPath device entries in the emcp.conf file. Updates the emcp.conf file by removing PowerPath devices that were not found in the host adapter scan and by adding new PowerPath devices that were found. Saves a primary and an alternate primary path to each PowerPath device.

The powermt Commands

This section describes each powermt command. Refer to the preface of this document for information on the conventions used in the command syntax. You can run powermt commands from either the command line.

Powermt

Displays the syntax for the commands in the powermt management utility.

Syntaxpowermtpowermt checkVerifies that all paths are connected to the correct Symmetrix volumes.

Syntaxpowermt check [dev=power#|all] [adapter=adapter#|all]

The dev parameter and the adapter parameter are optional. You must, however, specify at least one in the powermt check command.

powermt check_registration

Provides PowerPath license registration information. The powermt check_registration command is available from the command line only. It does not have an equivalent SMIT command.

Syntaxpowermt check_registration

powermt configConfigures paths to all known Symmetrix logical devices for maximum accessibility.

Syntaxpowermt config

powermt displayDisplays a table that shows the state of all host adapters found by PowerPath.

Syntaxpowermt display

powermt display devDisplays a table that shows the state of the specified PowerPath device or all PowerPath devices.

Syntaxpowermt display dev=power#|all

powermt restoreAttempts to reopen, or restore to service, all device paths currently marked as Closed.

Syntaxpowermt restore

powermt saveSaves changes to the PowerPath devices’ policy and priority attributes to the ODM so that the new values are in effect at system startup.

Syntaxpowermt save

powermt set adapter_switchEnables or disables the specified host adapter.

Syntaxpowermt set adapter_switch=disabled|enabled adapter=adapter#

Parameters

disabledDoes not allow the specified host adapter to accept I/O traffic for any device path it serves.

enabledAllows the specified host adapter to accept I/O traffic for any device path it serves.

adapter#The host adapter number shown in the ## column in the table displayed when you enter the powermt display dev command.powermt set modeSets device path(s) to either active or standby mode for the specified PowerPath device or for all PowerPath devices on the specified adapter.

Syntaxpowermt set mode=active|standby adapter=adapter# [dev=power#|all]

The dev parameter is optional. If you do not include the dev parameter, the powermt set mode command changes the mode of all PowerPath devices on the specified adapter.

powermt set policySets the load balancing policy for the specified PowerPath device or all PowerPath devices.

Syntaxpowermt set policy=rr|io|lb|so [dev=power#|all]

The dev parameter is optional. If you do not include the dev parameter, the powermt set policy command changes the policy of all PowerPath devices.

Parameters

Rr Round-robin. Future I/O requests are assigned to each of the available paths in rotation.Io I/O. Load balance is based on the number of pending I/Os.

Lb Least blocks. Load balance is based on the number of blocks in the pending I/Os.

powermt set prioritySets the I/O priority for the specified PowerPath device or for all PowerPath devices.

Syntaxpowermt set priority= [dev=power#|all]

The dev parameter is optional. If you do not include the dev parameter, the powermt set priority command changes the priority of all PowerPath devices.

The powermt set priority command is only meaningful when the load-balancing policy is Symmetrix optimized (so). This setting allows the I/O performance of a few, individual PowerPath devices to be improved at the expense of the rest of the devices, while otherwise maintaining the best possible load balance across all paths.

powermt validateVerifies that the primary path opened for each PowerPath device is connected to the correct Symmetrix volume.

Syntaxpowermt validate

powermt watchDisplays a table that shows the state of the host adapters for the specified PowerPath device or all PowerPath devices.

Syntaxpowermt watch every=#seconds

powermt watch devDisplays a table that shows the state of the specified PowerPath device or all PowerPath devices.

Syntaxpowermt watch dev=power#|all every=#seconds

1)To display registered/licensed software:

emcpreg -list

2)To install registered/licensed software:

emcpreg -install

Follow the prompts

3) To check the status of the system:

powermt display device=all

4) To check and see if LUNS are trespassed

powermt display device=all | grep -i owner

This should show you the default SP owner and the current SP owner

i.e.

hostname: [170] $ powermt display device=all | grep -i owner

Owner: default=SP B, current=SP B

Owner: default=SP B, current=SP B

Owner: default=SP B, current=SP B

Owner: default=SP B, current=SP B

Owner: default=SP A, current=SP A

Owner: default=SP A, current=SP A

Owner: default=SP A, current=SP A

Owner: default=SP A, current=SP A

5)To tresspass a LUN back to the default owner

powermt restore

6) When setting up PowerPath on a solaris system, make sure the policy setting is

set to CLAROpt.

Use the command powermt display device=all and look for the policy=CLAROpt

If it's not set, use the command powermt set policy=co

this will set up load balancing between SP's.

7) If you happent o make changes to a solaris system's storage group, and are having problems,

after a reboot, seeing the new devices and the old devices are still registered with PowerPath,

try running:

powermt check ( may have to remove dead paths )

powermt config

powermt save

Clariion Cache: Navicli Commands

The following sets of commands are run to change the cache options in the Clariion CX, CX3 and CX4 systems using NAVICLI. Most of these can also be performed using Navisphere Manager GUI.

This blog is an extension of my previous blog on Clariion Cache Flushing Techniques: Idle Cache Flushing, Watermark Cache Flushing and Forced Cache Flushing, links found below.

To Enable Cache on the Clariion

naviseccli – h setcache –wc 1 –rca 1 –rcb1

Command Arguments

-wc Write cache enabled (1) and disabled (0)

-rca Read cache for SPA enabled (1) and disabled (0)

-rcb Read cache for SPB enabled (1) and disabled (0)

To Disable Cache on the Clariion

naviseccli –h setcache –wc 0 –rca 0 –rcb 0

Command Arguments

-wc Write cache enabled (1) and disabled (0)

-rca Read cache for SPA enabled (1) and disabled (0)

-rcb Read cache for SPB enabled (1) and disabled (0)

To Set Cache to 2GB for Write Cache and Set Cache to 4GB for Read Cache on both SP’s (SPA and SPB)

naviseccli – h setcache –wsz 2048 –rsza 4096 –rszb 4096

Command Arguments

-wsz Write Cache Size and the amount of Cache (valid between 1GB and 3GB)

-rsza Read Cache Size for SPA and the amount of Cache (valid between 1GB and 4GB)

-rszb Read Cache Size for SPB and the amount of Cache (valid between 1GB and 4GB)

To sets the page size of cache to 4KB and the Low WaterMark to 60% and the High WaterMark to 80%

naviseccli – h setcache –p 4 –l 60 – h 80

Command Arguments

-p Cache Page Size: 4kb, 8kb, 16kb size

-l Low Watermark and the value

-h High Watermark and the value

To Disable HA Vault Drive Cache

naviseccli –h setcache –hacv 0

Command Arguments

-hacv HA Vault Cache enabled (1) and disabled (0)

To Enable HA Vault Drive Cache

naviseccli –h setcache –hacv 1

Command Arguments

-hacv HA Vault Cache enabled (1) and disabled (0)