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[DMX/Clariion]How to add additional path(powerpath) to a powerpath devices?
Blow are steps to add new paths to a logical device already configured in powerpath.
Procedure
To add paths to a PowerPath logical device:
1. Run powermt display to confirm the current configuration, and run powermt display dev=all to confirm the configuration of the logical device(s) to which new paths will be added. Ensure that the number of logical devices, hardware paths, and I/O paths are as expected. The path state should be alive for known good paths and dead for known bad paths.
If there is a problem, correct it before proceeding.
2. Make physical path additions as required:
• Map the logical device to additional storage-system ports.
• Add new HBAs. For details, refer to your vendor documentation.
• Attach cables.
• Re-zone Fibre Channel switches.
3. If using SAN Manager, Volume Logix, or Access Logix, make new paths available to the host using those tools.
4. The operating system must recognize new paths before PowerPath can do so. Table below provides additional information.
|
Platform |
Steps |
|
Windows 2003/2000 |
Scan for hardware changes in the Windows Device Manager. Alternately, reboot. |
|
IBM AIX |
Run the emc_cfgmgr script. For details, see the PowerPath UNIX documentation |
|
HP-UX |
ioscan -f insf -eC disk Adding HBAs also requires running the kernel configuration process and building a new kernel. New native devices are created; however, do not use them until PowerPath is reconfigured in step 5 of this procedure. |
|
SUN Solaris |
When using drivers other than Leadville, enter: devfsadm Note: New native devices are created; however, do not use them until PowerPath is reconfigured in step 5 of this procedure. When using Leadville drivers: 1. Run this command to learn the controller number for the Leadville cards on each host: cfgadm -vl 2. For each Leadville card, enter: cfgadm -vc configure cX where X = the controller number for the card 3. Rescan. Enter: luxadm probe 4. Enter: devfsadm |
|
Linux |
For RHEL 5 and SLES 10 SP1, see procedure for “Dynamic LUN addition and removal” on page 70. For RHEL 4 and SLES 9, the procedure is: 1. Stop all running applications, unmount any mounted filesystem. 2. Run /etc/init.d/PowerPath stop to stop PowerPath. 3. Unload the HBA driver module. Run modprobe -r <module_name>, where <module_name> is qla2300, lpfc, or some other value depending on the HBA used. 4. Reload the HBA driver module. Run modprobe <module_name>, where <module_name> is qla2300, lpfc, or some other value depending on the HBA used. 5. Run /etc/init.d/PowerPath start to start PowerPath. |
Table-1 Adding new paths to a PowerPath logical device
5. Reconfigure PowerPath.
|
Platform |
Steps |
|
Windows 2003/2000 |
No action is needed. |
|
UNIX |
Run powermt config. |
|
Linux |
1. Run the powermt release command. 2. Run the powermt config command. |
6. Inspect the new PowerPath configuration:
• Run powermt display dev=all. The new path(s) should be displayed with a state of alive.
• Run powermt restore to test all paths.
• Scan operating system error logs to ensure no errors are logged against the new paths.
Correct any issues detected.
7. Run powermt save to save the new configuration.