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Using Windows 7, I'm trying to setup what I've come to call a "Software Raid of Folders", not completely sure it's the right term, but I'm sure anyone who knows the true term will understand what I'm getting at.

I have two folders, on two seperate harddrive, I would like to "merge" these folders while keeping them on seperate harddrive so they act as one folder. Example:

Music and Videos are to be merged together to a new folder called "Merged"

Music runs off of Harddrive 1

Videos runs off of Harddrive 2

Anything new saved inside Merged is saved within Videos that runs off of Harddrive 2

Now you see how I came up with the term "Software Raid", it's like an average RAID 0 setup, but instead I want to do it with just two specific folders on two different drives within Windows. Any help on this is apprecieated!

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Why will new things be saved on Harddrive 2 as opposed to Harddrive 1? I think software raid is a bad analogy here. – aland Mar 30 '13 at 14:27
This sounds an awful lot like 7's in-built "Libraries". Why not just use those? – Ƭᴇcʜιᴇ007 Mar 30 '13 at 14:57
Essentially it's for a Server with a lot of data stored on it, another harddrive was added but they can't reconfigured their hardware RAID. So I'm looking for a software alternative as the software they are using completely works out of one folder. And Libraries? I wasn't aware they were customizable. How would you go about it? – Dustin Mar 30 '13 at 19:13
why can't they reconfigure hardware RAID? Seems like a pretty typical operation. – aland Mar 30 '13 at 19:54
As far as I knew, it would require a full reinstallation of the server wouldn't it? – Dustin Mar 30 '13 at 20:24
up vote 1 down vote accepted

Check out junctions,

You could have a folder, let's call it Merged Within that you have two subfolders Videos and Music and each of these sub folders contents reisde on different hdd.

Open a command prompt to the Merged directory and type the following, replacing with the name of the folder, e.g. Music and with the destination, e.g. D:\Music

mklink /j <junction_point_name> <target>
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Hang on, this creates two seperate folders, right? Instead of merging two? – Dustin Mar 30 '13 at 19:14
that's correct. see my comment on your question - how should it know which filesystem to save files to? – aland Mar 30 '13 at 19:53

You may consider using spanned volumes then if the data must not be in subfolders. However you'll need to make a backup of all the data from the existing volumes as it's a destructive process.

"Spanned volumes are a dynamic volume consisting of disk space on more than one physical disk."

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The only way I can see this working from my experience is using unallocated space of the same size on each of the additional HDD to create a Software raid using Windows disk manager, then if you want that to be a folder, then map it as a Folder when formatting it. I might be able to make a video of that once my Raid 5 finishes rebuilding.

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Howerever you could just symlink the music and video folders – Florentino DeLaguna Apr 29 '15 at 16:39

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