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removing the dead path luns

Occasional Contributor

removing the dead path luns

hi ,


I am facing a problem for removing the dead path in powermt output.

After migration of storage new luns and old luns still showing here i wnat to deleate the dead path only .


can any one help me to remove the dead lun path only with out disturbing alive path. because its prodiction server.


os hp unix


i will add the current out put off powernt display dev=all here.








Honored Contributor

Re: removing the dead path luns

powermt check is the command to remove dead paths

if you have manually removed an I/O path, check command will detect a dead path and remove it from the EMC path list.


 If you want powermt to automatically remove all dead paths, without any confirmation, execute “powermt check force”

Good Luck..
Occasional Contributor

Re: removing the dead path luns

Thanks for your reply



powermt check will remove the dead path from powermt out put only ,still may a chance to get NO_HW error on ioscan -fnC disk out put .



So i have to remove it from both place .



if there any more option here we can go through with out disturbing the current online paths.







Occasional Advisor

Re: removing the dead path luns

If all your applications are running OK then you should be able to savely remove the the old NO_HW paths.


man rmsf



Arockiasamy K
Frequent Advisor

Re: removing the dead path luns

Check whether multipath or single path. (ioscan -m dsf or powermt)


Check whether the HBA card is online or not. (fcmsutil /dev/tdx)

If the HBA card is not online, check the link and card.


Finally, go for the rmsf.

Arockiasamy K
Occasional Advisor

Re: removing the dead path luns



Check for the disks with NO_HW at the out of


#ioscan -fnkC disk"


You should see the list of detached devices.


There are 2 ways


You can remove them manually


#rmsf -H hw_path


You can remove them automatically. HP-UX choose to remove. Removes all the stale IO nodes and the stale device special files from the system.


#rmsf -x