Combine two HD into one

[MacPC]

Hi, I am not sure how this can be done. and I am not sure if RAID provide a solution to this.

I have two identical 500G SATA to USB HD. I would like to find a way to make them appear to be a 1T HD in Mountain Lion. I know Disk Util has some basic functions to set them up as RAID, but , it doesn't seem to be the right solution. All I want is for the two drivers appear to be one and back up my data. Any suggestions?

Thanks in advance.

 

[Heinous]

What you're looking for is caller RAID 0, but it is a bad idea. Combining 2 drives in to one volume means that if one drive fails, you will lose all the data on both drives. It's a bad idea for a working drive and an even worse idea for a backup.

 

[Fishrrman]

I agree with what poster #2 wrote.

I you don't specifically have a reason why you need RAID, it's best to stay away from it (as an end user). Can give you a lot of trouble, if one of the RAID'ed drives fails...