3PAR Users Group

A Storage Administrator Community




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: new disk is smaller than replaced
PostPosted: Wed Jul 17, 2019 1:00 pm 

Joined: Wed Jul 17, 2019 12:42 pm
Posts: 3
I have replace a failed drive on my 3par. Started the servicemag start, replace the drive then servicemag resume. Resume failed because the new disk is smaller than replaced. But the new disk has a new ID and is giving me a normal status.

Will I just continue on doing a dismiss on the old ID? since it has a new one and has a normal status?

Or Ill return the failed drive, do a servicemag start again?


Top
 Profile  
Reply with quote  
 Post subject: Re: new disk is smaller than replaced
PostPosted: Wed Jul 17, 2019 1:19 pm 

Joined: Mon Sep 21, 2015 2:11 pm
Posts: 922
Location: Europe
Replacing a big drive with a smaller drive doesn't fly with servicemag. The replacement will always get a new PDID but it sounds to me that your new drive has been admitted to the system as an upgrade and not as a replacement for the failed drive.

Do a showpd -c to check if any spare chunklets are still used.

_________________
The views and opinions expressed are my own and do not necessarily reflect those of my current or previous employers.


Top
 Profile  
Reply with quote  
 Post subject: Re: new disk is smaller than replaced
PostPosted: Thu Jul 18, 2019 4:10 am 

Joined: Wed Nov 09, 2011 12:01 pm
Posts: 332
Also is the new disk actually smaller then the old one?

If they are both the same spec/size then it might just be a change of model/revision and the new drive could just have a slightly smaller number of sectors which meant the 3PAR can't recreate the exact number of chunklets as the old one (like maybe one less).
We've seen this a few times, if this is the case then you can tell servicemag to ignore this issue and just continue with the rebuild (with the -partial option).

But yeah if one was 600GB and the other 900GB you'll want to replace it again. :)


Top
 Profile  
Reply with quote  
 Post subject: Re: new disk is smaller than replaced
PostPosted: Fri Jul 19, 2019 12:18 pm 

Joined: Wed Jul 17, 2019 12:42 pm
Posts: 3
Hello MammaGutt, OK, fail, Free in spare chunklets are 0 so I think there is no spare

Hello ailean, both are on the same size but our 3par sees the new disk as less space.


Top
 Profile  
Reply with quote  
 Post subject: Re: new disk is smaller than replaced
PostPosted: Sat Jul 20, 2019 10:48 am 

Joined: Wed Jul 17, 2019 12:42 pm
Posts: 3
Hello MammaGutt and ailean,

Appreciate your help here. My issue has been fixed with the -partial option, telling the 3par to ignore the issue. Also before -partial option work, I have to make sure that there are no spare chunklet being. I did this by moving the spare. Learned a lot from the both of you. Thanks again!


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 


Who is online

Users browsing this forum: Google [Bot] and 26 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