Solved

Raid 5 - HW vs Linux conf?

Posted on 2008-11-03
5
402 Views
Last Modified: 2013-12-15
I am building a Raid 5 server to "secure" my data. It is going to be a Linux system with an AMD 64 X2.

The initial idea was to use the built in Raid 5 support on the mother board. But then I thought what will happen if the motherboard breaks down. Will it be possible to get a new one and save the data? Does it have to be the exact same kind, etc, etc? In this aspect, would it be better to let the Linux system handle all the Raid 5 configuration? If so, what will happen to performance?
0
Comment
Question by:obg
[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
5 Comments
 
LVL 43

Accepted Solution

by:
ravenpl earned 250 total points
ID: 22865695
Since the onboard raid5 is so called bios-raid or fake-raid, please go with linux software raid.
CPU usage is the same (as bios-raid does the xor calculation with main cpu anyway)
The advantage is that moving drives to different sata controller saves Your raid configuration.
0
 
LVL 2

Author Comment

by:obg
ID: 22865756
Thanks ravenpl! This kind of comment is definately what I was looking for. I will leave it open for a little bit longer though, if somebody has any objections or additional info.
0
 
LVL 19

Expert Comment

by:jools
ID: 22866345
Agree with ravenpl.... sound advice IMHO.

Who could possibly object! :-)

0
 
LVL 2

Author Comment

by:obg
ID: 22866424
Well, I don't know. That's why I asked in the first place... ;)

It would be great to hear some real life experiences... Is it stupid to have a set of five identical disks? (- If they all break down att the same time.) Well, that's not part of the original question.
0
 
LVL 19

Expert Comment

by:jools
ID: 22866703
For it to work at it's best, they should all be identical.

If they all break down at the same time I'd go and buy a lottery ticket....wot are the chances of that??!

The following is just my 2p, FWIW I think ravenpl has covered the basics off...
I use software raid on a server 2x18G RAID 1 and 4 x 300GB Raid 10, I also use LVM, Whilst the server is not really heavily used it has been rock solid and I've not had any performance problems thus far. The RAID has been configured as software raid.

I would use hardware raid if the server configuration called for it but only if the drivers were available that correctly reported the RAID status to the kernel. By hardware RAID, I mean a separate RAID controller.

I would not use the on board RAID controller supplied by any motherboard, this is not because they are unreliable, especially in a windows environment, I just dont see the benefit, as mentioned above, the CPU or onboard chipset will do the processing anyway but it will still not be as good as a decent hardware raid controller (not forgetting the possibly driver issue mentioned above. It's just my own personal preference.

For the systems that I do use hardware RAID, I know that if the raid controllers go bad, I can slip another one in and it will be fine. I don't know if this is the case with onboard raid, it could mean trying to find another motherboard with the same raid controller and the same firmware rev.

apologies if I waffled on a bit...

0

Featured Post

Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

Question has a verified solution.

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

Facing problems with you memory card? Cannot access your memory card? All stored data, images, videos are lost? If these are your questions...than this small article might help you out in retrieving your lost or inaccessible data.
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 tutorial will walk an individual through the steps necessary to enable the VMware\Hyper-V licensed feature of Backup Exec 2012. In addition, how to add a VMware server and configure a backup job. The first step is to acquire the necessary licen…
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.

632 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