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Powerpath pseudo devices
Hi
I am using Powerpath with EMC AX4. I have configured powerpath to have the pseudo devices for my LUNs in server. I want to keep the device to pseudo name mapping intact even after reinstalling the powerpath software. I once reinstalled the powerpath and found that the pseudo names are changing. But for my application the names should remain the same. How can i acheive that?
I have tried powermt save option to save the configuration and then load it after reinstalling the powerpath but it did not work. Is there any other option?
Thanks
regards
karthik
dynamox
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April 6th, 2011 03:00
take a look at PowerPath manual for the following commands:
emcpadm export_mappings
emcpadm import_mappings
dynamox
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April 6th, 2011 04:00
not sure if it relies on LUN WWN or logical name.
avs
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April 6th, 2011 04:00
Hi
Does it use LUN WWN to save LUN to PowerPath device name mapping?
Best regards,
Alex
karthikm
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April 6th, 2011 05:00
Hi
I guess this will help me. I will explore this.
Thanks !
regards
karthik
dynamox
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April 6th, 2011 06:00
take a look at this primus for examples:
emc205443
Sam Claret
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April 7th, 2011 02:00
If you goto Support - Search support in powerlink.emc.com and put emc205443 the first link should show you the article
Alternatively here is the link to the article
http://csgateway.emc.com/primus.asp?id=emc205443
Sam Claret EMC TSEIII
karthikm
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April 7th, 2011 02:00
Hi
I have tried to load my custom configurations through powermt load option and emcpadm also but it is not working. It is showing the same configuration. where can i refer that primus. can you tell me the link?
Thank you
regards
karthik
karthikm
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April 7th, 2011 04:00
Hi
This is solaris 10 9/10. I hv referred the primus too and i did the same still not getting.
regards
karthik
karthikm
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April 7th, 2011 04:00
Hi
Yes I tried renaming devices. I can do that successfully but that will not solve my purpose.
root@t3-1x1778 # /opt/EMCpower/bin/emcpadm check_mappings -v -f /emc_devices1
Imported Device Remapping Status
Mapping
---------------- ------------------------------------------
emcpower0a remaps: emcpower7a emcpower0a
emcpower1a remaps: emcpower6a emcpower1a
emcpower2a remaps: emcpower5a emcpower2a
emcpower3a remaps: emcpower4a emcpower3a
emcpower4a remaps: emcpower3a emcpower4a
emcpower5a remaps: emcpower2a emcpower5a
emcpower6a remaps: emcpower1a emcpower6a
emcpower7a remaps: emcpower0a emcpower7a
You can see above the mapping details. it tells clearly that the current system configuration differs from the one in the file. According to the primus solution the config in the file takes precedence. But it is not so. even after importing and saving the config still it shows old one.
dynamox
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April 7th, 2011 04:00
what OS ?
karthikm
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April 7th, 2011 04:00
EMC powermt for PowerPath (c) Version 5.3 (build 473)
dynamox
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April 7th, 2011 04:00
have you tried just manually renaming devices using "emcpadm rename"
dynamox
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April 7th, 2011 04:00
take a look at this primus: emc254836
dynamox
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April 7th, 2011 04:00
What powerpath version do you have installed ?
powermt version
Sam Claret
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April 7th, 2011 05:00
http://csgateway.emc.com/primus.asp?id=emc254836