Adding 2 disks to a Raid 0 to make it a Raid 0+1

Currently I have a system set up (with GigaRAID) as a Raid 0 (striping).  I want to add two more drives to make it a RAID 0+1...but I don't want to lose my data on the original two drives.  I just want to plug in the two new ones and tell it to add those in and mirror to them.  I've looked in the RAID BIOS configuration and I've launched the Windows software tool.  Both of them seem unclear as to whether or not I'll lose my data.

Any ideas?

I'm in a hurry, so I'm assigning a high point value!
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

tycenAuthor Commented:
More info...

To clarify, it seems that in the Windows tool I need to delete my current array (0) and then with all four disks available, set up an array 0+1.  But, if I delete the array, will I delete data or will it just delete the array layout?
You will lose your data if you follow their process.  What you need to do is use a program like Symantec Ghost to take a snapshot of your system before doing this.  You might want to get a tape backup as well (if available).  Then set up the array as you want and restore the data using Ghost.  I just don't believe you can turn your RAID0 into a RAID0+1...


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
tycenAuthor Commented:
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

Have a look at acronis trueimage. I've used that on raided drives and it worked (maybe I was just lucky, because I was also able to make an image of a raid system with ghost). I did have to try a couple of times, though. migrating a raid 0 system to raid 10 might work but also there you'd need to be lucky, so a backup is essential.
I have used Ghost to backup and restore RAID1 arrays a few times.  I also have a couple of friends who use it at their work.  Basically we have all used it when performing drive upgrades.  I just used Symantec Ghost 8.0 about 3 months ago to backup a Dell server running RAID1 (Perc4/SC SCSI RAID controller) and restore it to larger disks (36GB to 73GB).  It worked like a charm.  I had no idea this wasn't a supported configuration as I've used this several times.  Then again, I have not used it to backup a RAID0 and then restore to a RAID0+1, but it *should* work.

Again, if you do choose to try this, I would also get a backup on tape too.

Any way you slice it this is going to be quite the project.  It should go well though, but as you probably know, you have to plan for the worst.

What RAID controller are you using? It might be possible through some model's BIOS...

It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.