Solved

Converting RAID 1 to RAID 5 without losing my data

Posted on 2006-11-09
8
3,644 Views
Last Modified: 2011-08-18
Hi there!


We have a machine (Proliant DL380/G2) with 2 x 36GB SCSI - RAID 1 mode (hardware); running on Windows 2003 server.
Now, we want to use 4 x 36GB SCSI in RAID 5 mode.

I don't want to lose data.  Is there a way to convert/reconfigurate my RAID without formating, reinstalling and configurating all the software?

Thanks in advantage!


Alex


0
Comment
Question by:alexgcm
[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
8 Comments
 
LVL 3

Expert Comment

by:pweegar
ID: 17908872
It may be possible, depending on your hardware. Do a search on this site for: convert raid1 raid5.  There is a bunch of posts covering this topic
0
 
LVL 55

Expert Comment

by:andyalder
ID: 17909739
Do you have a battery backed write cache enabler? This is an option so may not be present on your particular DL380/G2. You can confirm by looking at the current setup in the ACU and selecting the logical drive on the array and seeing if you can change the read/write ratio. Tell us the current R/W ratio.
0
 
LVL 70

Accepted Solution

by:
garycase earned 250 total points
ID: 17914375
"... without formating, reinstalling and configurating all the software? " => On-line RAID mode changes are always a bit risky, even if your controller supports it.   But you can easily avoid the need to re-install and re-configure by simply doing this:  (1)  Make a current image of your system (to an external drive or to another internal drive that's not part of the RAID array);  (2)  Delete your RAID-1 array;  (3)  Add any disks you'll be using ... and create the RAID-5 array;  (4)  Restore the image to the new array.

Any good imaging program that "sees" the array (since it's a hardware array most should) will work fine.   I prefer Boot-It NG (www.bootitng.com), which has a free demo that should work fine for what you need.  The interface is a bit "geeky" ... but it's a very well focused program that is direct and to-the-task.

0
Edgartown IT Case Study

Learn about Edgartown's quest to ensure the safety and security of the entire town's employee and citizen data. Read the case study!

 
LVL 55

Expert Comment

by:andyalder
ID: 17914391
HP don't consider it risky with that particular RAID controller so long as the BBWCE is fitted.
0
 
LVL 1

Author Comment

by:alexgcm
ID: 17917191
I will do what garycase suggested.

Thank you!
0
 
LVL 55

Expert Comment

by:andyalder
ID: 17917248
On a server that is designed to convert from RAID 1 to RAID 5 on the fly?
0
 
LVL 70

Expert Comment

by:garycase
ID: 17917392
You're welcome.    ... as to whether that's unnecessary when the controller supports an on-the-fly conversion ==> I would still ALWAYS be sure you have a complete backup.   A safe alternative to what I suggested would be to do step #1 (create the image) ... and then try the on-the-fly conversion.   Then if anything goes awry you can simply do steps 2, 3, and 4 :-)
0
 
LVL 55

Expert Comment

by:andyalder
ID: 17917447
Of course you should have a complete backup, but surely anyone who owns a rackmounted server takes a backup every day anyway?
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

This article is an update and follow-up of my previous article:   Storage 101: common concepts in the IT enterprise storage This time, I expand on more frequently used storage concepts.
Is your phone running out of space to hold pictures?  This article will show you quick tips on how to solve this problem.
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…
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…

691 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