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I have a proliant ml350p gen8 HP SERVER with centos 6.2 and two hard disk with 1 TB for both.

I have several GB of files and software about 100) with their configurations but I want to install RAID 1 (mirror).

Then:

1) I know that RAID configuration must be done in the starting phase because it is a delicate operation. But, now? Is it possibile to loose all the OS?

2) I don't find a clear tutorial for this RAID configuration. What about?

3) If (1) is true, how can I make a cloned OS backup? Is it possible?

Thank you so much

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1) Yes it's possible to lose what's on the disks already but generally people don't change RAID levels mid-production. 2) Press F5 during disk controller boot to load ACU and create a R1 Mirror - that's all - should say '1 Logical Disk' at controller boot. 3) Just DD it off somewhere or reinstall.

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