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Questions on Backing up RAID setup...

post #1 of 12
Thread Starter 
I don't know much about RAID, though, I recently setup my rig in RAID 1, and from what I understand if one disc fails, you can replace it and not lose your data, is this correct?

I want to ensure that this is the case.

Furthermore, I'd like to know if I make a disc image of the RAID, will it take a snap shot of just one disc?

If I restore the RAID from and image will I need to restore both disc?
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post #2 of 12
Feesibly yes, if one dies you should be able to replace the failed disc and allow the array to rebuild. Some controllers are much friendlier than others when it comes to this.

If your controller supports spares then I'd suggest tossing in another disc and marking it as a spare so that the transition can be somewhat seamless.


The array is seen as one logical drive even though it consists of two physical discs, making a copy of the logical drive will be the same as copying a single physical drive.
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post #3 of 12
In RAID1 (mirroring) setups, when the 1st disk fails the second takes its place. you just need to replace the bad HDD for a new one and "tell" the raid utility that there is a new HDD installed, and it all goes just like it was before, no need for system images
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post #4 of 12
Thread Starter 
You mean I could put a 3rd disc into the RAID 1?

Any direction on how to do this?
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post #5 of 12
Thread Starter 
Quote:
Originally Posted by matroska View Post
In RAID1 (mirroring) setups, when the 1st disk fails the second takes its place. you just need to replace the bad HDD for a new one and "tell" the raid utility that there is a new HDD installed, and it all goes just like it was before, no need for system images
Thanks for your input..

I do want to make an image because it's quite possible something can happen, like you get a very nasty malware or virus, and not having an image really isn't an option to me, I rely on images to restore my computer if it become inoperable due to viruses/malware, and this is something I don't want to stop doing...

So if anyone has knowledge/insight on imaging a hard drive in RAID, please help.
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post #6 of 12
Redundant raid is not a solution to avoid data corruption or viruses as it will just propagate to both drives.

As far as I know, the RAID controller presents the array to the operating system as one disk, so making an image should not be an issue, nor should it be an issue restoring the image to the array.

All you need is an app to make the image.
    
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post #7 of 12
Thread Starter 
Quote:
Originally Posted by _02 View Post
Redundant raid is not a solution to avoid data corruption or viruses as it will just propagate to both drives.

As far as I know, the RAID controller presents the array to the operating system as one disk, so making an image should not be an issue, nor should it be an issue restoring the image to the array.

All you need is an app to make the image.
TY 02, I see it exactly how you do, you gotta still have a backup...

So Acronis would work then?

Would it be easier to just take one drive out, replace it with a blank one, wait till it's done building that disc in the array, and then remove it? Could I use the built & saved disc as a backup?
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post #8 of 12
Quote:
Originally Posted by matroska View Post
In RAID1 (mirroring) setups, when the 1st disk fails the second takes its place. you just need to replace the bad HDD for a new one and "tell" the raid utility that there is a new HDD installed, and it all goes just like it was before, no need for system images
It sounds much easier than that though I have heard of MANY cases where people have booted a failed raid with a new replacement disc and ended up wiping the old raid configuration in the process.

Quote:
Originally Posted by _GTech View Post
You mean I could put a 3rd disc into the RAID 1?

Any direction on how to do this?
No, you want one disc labeled as a spare (some controllers support spares, some do not). A spare will sit idle until one of the physical drives in the array dies, once the controller detects the failed drive it will replace it with the hot spare.
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post #9 of 12
Quote:
Originally Posted by _GTech View Post
TY 02, I see it exactly how you do, you gotta still have a backup...

So Acronis would work then?

Would it be easier to just take one drive out, replace it with a blank one, wait till it's done building that disc in the array, and then remove it? Could I use the built & saved disc as a backup?
That method requires more effort than it's worth, you're better off creating images of the logical disc periodically and storing them somewhere else (external drive, etc).
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post #10 of 12
Quote:
Originally Posted by _GTech View Post
TY 02, I see it exactly how you do, you gotta still have a backup...
Ultimately, yes.

This is why I opted to put my 3 drives in RAID0 for the OS and just manually image my 1tb data drive to a 1tb backup drive instead of implementing a RAID array.
    
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