Unsolved
This post is more than 5 years old
227 Posts
0
2074
PowerPath does not pring the second path up after failover
Hello ,
i was trying to simulate a failover test on an AIX machine, i removed one cabel for few minutes, then replug it again , the server can not detect the second path till we ran powermt config. running powermt display shows the second path as "FAILED" till reconfig PP.The question is why do i need to run powermt config? it should be detected automatically without interaction ,right ? am running the latest PP version!
Brion2
154 Posts
0
January 24th, 2011 08:00
Hi. Are you connected to a CLARiiON? What failover mode did you configure for the host?
Thanks, Brion
Joe_Ab
227 Posts
0
January 24th, 2011 22:00
Hi Brion,
Its connected to SYM , am using fast fail.
Thnx.
Brion2
154 Posts
0
January 28th, 2011 11:00
What version of PP? What version of AIX? Can you detail your exact steps and provide output of the "powermt display?"
Thanks, Brion
Joe_Ab
227 Posts
0
January 29th, 2011 22:00
PP 5.3 , AIX 5.3. we removed the cable from HBA0 then wait few second , plug it again , powermt display shows dead paths , plugging the cables back does not bring up the path automatically ,you should run powermt config..
Brion2
154 Posts
0
January 31st, 2011 05:00
Hi. What is the output of the "powermt display options" command?
pozzebom_ezequi
24 Posts
0
January 31st, 2011 10:00
Powerpath should bring the dead path back to alive after the issue is corrected (cable pluged back).
This may take some time, PP rescans the paths times in times. In order to force a rescan of the path you can run a "powermt restore", so PP will rescan the path right away.
I hope it helps.
Joe_Ab
227 Posts
0
January 31st, 2011 22:00
"Degraded" ..
Joe_Ab
227 Posts
0
January 31st, 2011 22:00
i will try the restore one and update you back , thanks
Brion2
154 Posts
0
February 1st, 2011 04:00
Attempting to manually restore using the "powermt restore" command is a good idea because PowerPath restores dead paths automatically based on the results of path testing. PowerPath path testing is given a lower priority than application I/O. If the system is busy, it may take longer for a path to be automatically restored. Also, the output of the "powermt display options" should show whether or not the periodic autorestore is on or off. If it is off, the path will not automatically restore.
Brion2
154 Posts
0
February 1st, 2011 09:00
Try: "powermt display options"
You should see an output similar to this:
powermt display options:
Default storage system class: all
Show CLARiiON LUN names: true
Path Latency Monitor: On
Path Latency Threshold: 1 Sec.
Storage
System Class Attributes
------------ ----------
Symmetrix periodic autorestore = on
status = managed
CLARiiON periodic autorestore = on
status = managed
Hitachi periodic autorestore = on
status = managed
Invista periodic autorestore = on
status = managed
HP xp periodic autorestore = on
status = managed
Ess periodic autorestore = on
status = managed
Joe_Ab
227 Posts
0
February 1st, 2011 09:00
Hi Brion,
Where can I find the mentioned autorestore ? I do not have an access to that machine now , but am trying to run powermt display on windows one with the below results ;
C:\Documents and Settings\yousef>powermt display
Symmetrix logical device count=20
CLARiiON logical device count=0
Generic logical device count=0
Hitachi logical device count=0
Invista logical device count=0
HP xp logical device count=0
Ess logical device count=0
HP HSx logical device count=0
==============================================================================
i can't find anything related to autorestore ?
Nollaig1
1 Rookie
1 Rookie
•
137 Posts
0
February 4th, 2011 04:00
Hello,
The product guide is available on powerlink at (menu options)
Home > Support > Technical Documentation and Advisories > Software ~ P-R ~ Documentation > PowerPath Family > PowerPath > General Reference
http://powerlink.emc.com/km/live1/en_US/Offering_Technical/Technical_Documentation/300-006-627.pdf?mtcs=ZXZlbnRUeXBlPUttQ2xpY2tDb250ZW50RXZlbnQsZG9jdW1lbnRJZD0wOTAxNDA2NjgwNTVhZDBjLG5hdmVOb2RlPVNvZndhcmVEb3dubG9hZHMtMg__
It should help with all your queries.
Hope this helps,
Nollaig