Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Disk performance for HP Proliant G5 Server

Posted on 2014-03-24
4
Medium Priority
?
412 Views
Last Modified: 2014-03-26
For a HP Proliant G5 server with 8 x 146GB 10K RAID-5 disk, how to estimate the MB/s for read & write ? How to estimate the IOPS ?

Tks
0
Comment
Question by:AXISHK
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 56

Expert Comment

by:andyalder
ID: 39950892
There are some useful graphs in this whitepaper, the controller is a bit later than the P400 but the values are pretty much the same as it's the disk speed that matters. http://tinyurl.com/m9j7c9m (it explains the RAID 5 write algorithm too).
0
 

Author Comment

by:AXISHK
ID: 39955246
In the article, "
Each physical link can support a maixum bandwidth : 6 GiB/s (600 MiB/s)  when 6 GiB/s SAS drives are attached"

Does it mean 6 GiB/s link can deliver 600 MBytes/s of data, with 6 Gigabit/s of SAS ports ? For MiB/s, is it the same as MB/s ?

Tks
0
 
LVL 56

Accepted Solution

by:
andyalder earned 2000 total points
ID: 39957195
HP have made an error there, it should be a lower case b since they are 6Giga bits per second  lanes (with your older card it's actually 3Gbps. Since it's a storage article they use Gi rather than G to represent gibi or 1073741824, you probably already know from the size you buy disks in that disk makers are pedantic and refer to a gigabyte as being 1000000000 bytes. The maximum bandwidth of the SAS bus is irrelevant though, you can't read the data from the platters anywhere near that speed.
0
 

Author Closing Comment

by:AXISHK
ID: 39957886
Tks
0

Featured Post

Important Lessons on Recovering from Petya

In their most recent webinar, Skyport Systems explores ways to isolate and protect critical databases to keep the core of your company safe from harm.

Question has a verified solution.

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

The business world is becoming increasingly integrated with tech. It’s not just for a select few anymore — but what about if you have a small business? It may be easier than you think to integrate technology into your small business, and it’s likely…
A look at what happened in the Verizon cloud breach.
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…

604 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