topic Re: Polyserve and san storage in Storage Software

Polyserve and san storage

Razar — Wed, 13 Aug 2008 18:09:30 GMT

I have a ps cluster on a private SAN with some clustered storage. 2 storage controllers, 4 paths on each controller, both serving up the same volumes (active active). Each linux host has a single FC path to the san.

Each host in a perfect world see's 8 paths to each lun.

Then....a storage controller fails.
Controller gets replaced (diff WWN)
The linux hosts now see the available devices in /proc/scsi/scsi however polyserve will not use them. They show up as "Importable" devices but essentially they are the same but with a different path. Will performing the import function wipe everything out? or is there a config change I need to make somewhere for polyserve to use these paths again?

Thanks

Re: Polyserve and san storage

IBaltay — Wed, 13 Aug 2008 18:41:32 GMT

Hi,
here is the polyserve manuals page:
http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual〈=en&cc=US&prodSeriesId=3435148&prodTypeId=18964&refresh=true

Re: Polyserve and san storage

IBaltay — Wed, 13 Aug 2008 18:46:20 GMT

some additional info:
could you check the matrix.log and matrix server service event.log for possible messages on the path problems pls?

Re: Polyserve and san storage

Razar — Wed, 13 Aug 2008 18:46:39 GMT

I've tried that page and for whatever reason HP is "very sorry" and "The page you requested can not be found."

Ya got another link I can try??

In the meantime, here's some additional info....

When I try to perform a "sandiskinfo" I get the following error:
:ERROR:Unable to collect vendor data for /dev/psd/psd4 due to device open error: Operation not permitted.

It's obviously looking down a path that no longer exists due to the controller swap that needs to be updated.

Re: Polyserve and san storage

IBaltay — Wed, 13 Aug 2008 18:54:39 GMT

Here is the hp polyserve matrix server admin guide link:
http://bizsupport.austin.hp.com/bc/docs/support/SupportManual/c01519283/c01519283.pdf

Re: Polyserve and san storage

Razar — Wed, 13 Aug 2008 18:55:45 GMT

Thank you, that link worked....I'll start reading.

Re: Polyserve and san storage

Razar — Wed, 13 Aug 2008 19:51:51 GMT

not a single error in matrix.log
.
.
.
been reading the manual....I don't see any "warnings" about importing disks. However, it doesn't make any mention about them being identical disks on a different path.

In the SAN maintenance section it describes swapping out switches but nothing about storage controllers

I'm leaning down the path of "mx config mp" so far...

Re: Polyserve and san storage

IBaltay — Wed, 13 Aug 2008 21:29:56 GMT

Maybe Matrix server only has detected/named (globaly unique name)the disks as a new disks or something like that. Thats why one thing is to try to rename them with the previous names, or simply import the disks into the Matrix servers:
http://www.dba-oracle.com/real_application_clusters_rac_grid/polyserve_cfs.htm