HPE Storage Users Group

A Storage Administrator Community




Post new topic Reply to topic  [ 2 posts ] 
Author Message
 Post subject: Raid 5 3+1 vs 7+1
PostPosted: Fri Mar 22, 2013 9:09 am 

Joined: Tue Aug 28, 2012 4:33 am
Posts: 4
We have a F400 array, which has 2 CPG of FC. One is raid 5 3 + 1, the other one is 7 + 1. in the properties of the CPG, I see availability is cage, and preferred chunklets is Fast. HP claims that the 3 + 1 should be used to create "fast" disks, with 7 + 1 being the slower tier. is this correct?


Top
 Profile  
Reply with quote  
 Post subject: Re: Raid 5 3+1 vs 7+1
PostPosted: Sat Mar 23, 2013 1:22 am 
Site Admin
User avatar

Joined: Tue Aug 18, 2009 10:35 pm
Posts: 1328
Location: Dallas, Texas
Preferred Chunklets "fast" refers to placement of the data toward the outer tracks of the spinning disk where data moves faster beneath the drive heads, as opposed to the slower inner inner tracks of the disk.

In addition to that, Raid 5 3+1 does perform slightly better than 7+1, but costs more raw capacity for raid overhead.

Image

_________________
Richard Siemers
The views and opinions expressed are my own and do not necessarily reflect those of my employer.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 


Who is online

Users browsing this forum: No registered users and 60 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