How to fix – PowerPath Degraded
You came to know that PowerPath is in degraded state either via your incident mechanism or via any alerting system you have. You have to fix it so PowerPath can take care of multi-path intelligently.
Login to server where issue reported and gain elevated privilege as super user and run below command. Location of PowerPath command varies depending upon OS. For RHEL you can use locate command to find out command location or which command in case of Solaris. If you are using EMC Storage, SYMCLI, PowerPath in your environment it is better to set your .profile so you need not to worry about absolute path every time you want to run these commands. In general it gets installed in /usr/symcli/bin/. Veritas Volume Manager is present with PowerPath.
Normally this happens due to disks reclaimed.
# locate powermt for RHEL # which powermt for Solaris Run below command it will confirm if PowerPath is in degraded state or not. # powermt display Error: PowerPath 3072 [email protected],600000/[email protected]/[email protected],0 degraded 28 13 - 0 13 Solution To troubleshoot issue please run below commands 1.# powermt display dev=all You can use pipe to grep dead and look for “dead” device(s) – see example below Pseudo name=emcpower8a Symmetrix ID=000187880133 Logical device ID=0A52 state=alive; policy=SymmOpt; priority=0; queued-IOs=0 ============================================================================== ---------------- Host --------------- - Stor - -- I/O Path - -- Stats --- ### HW Path I/O Paths Interf. Mode State Q-IOs Errors ============================================================================== 3072 [email protected],600000/[email protected]/[email protected],0 c0t5006048ACCB4B149d56s0 FA 10cA active dead 0 1 2.Verify if device(s) are not in use via below command to make sure you are dealing with right devices. # vxdisk –eo alldgs list | grep –i emcpower8 3.If device not reported in step 2 you can proceed to step 3 to forcibly remove those devices. # powermt check force This will remove all the dead devices. 4. Re-validate PowerPath status run validation step again you will find it in optimal state. # powermt display 3072 [email protected],600000/[email protected]/[email protected],0 optimal 15 0 - 0 0
That,s all,You are good now.
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