3PAR Users Group

A Storage Administrator Community




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: RCG's - Exported LUN ID - have to be the same?
PostPosted: Tue Oct 22, 2019 7:59 pm 

Joined: Tue Jan 22, 2019 2:06 pm
Posts: 26
Location: Calgary, AB
Hello everyone.

Hopefully a quick answer...

We have several VLUNs which are in a remote copy group to a 2nd array. When some of the VLUN's were exported to the hosts, the main VLUN had one LUN number used and the RCG had a different one used.

Example

VLUN_01 - Exported as LUN 10
VLUN_01.r - Exported as LUN11

Will this have any affect on the .r LUN if the primary storage node goes down and VM's have to fail over to the 2nd node?

Or is the WWNN soley used in this case and the LUN number used on export is irrelevant?


Top
 Profile  
Reply with quote  
 Post subject: Re: RCG's - Exported LUN ID - have to be the same?
PostPosted: Tue Oct 22, 2019 8:08 pm 

Joined: Tue Jan 22, 2019 2:06 pm
Posts: 26
Location: Calgary, AB
Came across this, a person notes they should be the same...
https://community.hpe.com/t5/3PAR-Store ... -p/7025015


Top
 Profile  
Reply with quote  
 Post subject: Re: RCG's - Exported LUN ID - have to be the same?
PostPosted: Wed Oct 23, 2019 4:03 am 

Joined: Wed Nov 09, 2011 12:01 pm
Posts: 344
The preference is that they be the same, improves compatibility with some hosts.

Pain though it is to do in practice, especially if you already used LUNs from both arrays.

I consider it a tidier method for diagnostics and less confusing for host admins. :)

I believe VMware can cope with them being different but it might need an option setting in the ESX consoles to enable.

So if you can, match them, if a lot of pain involved try without but test each OS to make sure they survive a switchover (on a test LUN ;)). You can look at the paths on the host to see if it lists both the active and standby ones, can also get into digging deeper into the TDID numbers on each path.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 


Who is online

Users browsing this forum: Google [Bot], Majestic-12 [Bot], MSN [Bot] and 30 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group | DVGFX2 by: Matt