Solved

HP Smart Array  421i: Better I/O Performance

Posted on 2013-01-05
4
1,654 Views
Last Modified: 2013-01-07
Infrastructure:
HP DL380p G8
Smart Array P420i Controller with 512MB FBWC
vmWare ESXi 5.1,  SBS 2011

1. Issue
Up and running a Array RAID 5 with 3 x 600GB 10k SAS.
Now we add  3 x 600GB 10k.
How will we have better Perfomance?
a) Add these 3 Disks to the existing Array
b) A new Array RAID 5
c) Other solution

2. Issue
Installation of  2GB FBWC Option for P420i Controller.
That these bring Perfomance?
0
Comment
Question by:perolin
4 Comments
 
LVL 47

Expert Comment

by:dlethe
ID: 38746917
The answer ... it depends.   What is ratio of reads vs. writes vs. random vs. sequential?    Are you married to RAID5?  RAID10 will outperform RAID5 on every benchmark except for a few contrived I/O tests that pretty much never happen in the real world.
0
 
LVL 1

Assisted Solution

by:mvirnoche
mvirnoche earned 200 total points
ID: 38746945
If you can lose all the data you could go for a RAID10 setup although I've seen RAID5 perform faster in my personal setups. You could either stripe the initial RAID5 onto a new RAID5 making it a RAID50; you could just re-initialize the whole thing into one large RAID5 which is what I have done before.
0
 
LVL 55

Accepted Solution

by:
andyalder earned 300 total points
ID: 38747097
RAID 10 would certainly be faster for writes and you can convert from RAID 5 to RAID 10 on the fly after adding the disks. Depending on your version of VMware you may need to reboot to the ACU to kick off the array expansion but you can re-start VMware before the expansion has completed. If you do not know the I/O profile then it's generally best to just have one array with everything running on it, if you were to split it up so Exchange for example got its own disks then when Exchange was quiet the other VMs couldn't benefit from the extra IOPS those dedicated disks would give.
0
 
LVL 2

Author Closing Comment

by:perolin
ID: 38750590
Thanks for Comments
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Western Digital 2TB Red Not Being Detected By RAID Card 15 90
Server HP DL380 G7 13 47
High performance NAS comparable to 8Gbps SAN ? 3 70
NIC on Proliant 4 32
More or less everybody in the IT market understands the basics of Networking, however when we start talking about Storage Networks, things get a bit dizzier, and this is where I would like to help.
Data center, now-a-days, is referred as the home of all the advanced technologies. In-fact, most of the businesses are now establishing their entire organizational structure around the IT capabilities.
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question