Solved

Disk performance for HP Proliant G5 Server

Posted on 2014-03-24
4
408 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 55

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 55

Accepted Solution

by:
andyalder earned 500 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

Don't Cry: How Liquid Web is Ensuring Security

WannaCry is just the start. Read how Liquid Web is protecting itself and its customers against new threats.

Question has a verified solution.

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

Finding original email is quite difficult due to their duplicates. From this article, you will come to know why multiple duplicates of same emails appear and how to delete duplicate emails from Outlook securely and instantly while vital emails remai…
In this article we will learn how to backup a VMware farm using Nakivo Backup & Replication. In this tutorial we will install the software on a Windows 2012 R2 Server.
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 Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

717 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