Have 2x HDD's in RAID0

Want to add another 2x HDD's to the array (all drives are identical).

Is there any way I can do this without wiping the drives? I dont have 2TB of storage spare to back the data up to...

It depends on the RAID controller. What make/model is it? Do you know if it has "online capacity expansion"?

I have no idea... it's the RAID card on my mobo (Foxconn A7DA-S)

i think you can do this, regardless of operating system...

if the raid is on your motherboard, it's 99% most likely windows software raid.

i think all you need to do is go into disk management and add the disk to the array and let it rebuild... but in all honesty, i've never set up a windows soft-raid (well, that's not true, but vmware doesn't count)... in linux, all you have to do is run "mdadm --add" and wait.

Quote from bunder9999 :

i think you can do this, regardless of operating system...

if the raid is on your motherboard, it's 99% most likely windows software raid.

i think all you need to do is go into disk management and add the disk to the array and let it rebuild...

I must admit I've never heard of that. Source?

Quote from amp88 :

I must admit I've never heard of that. Source?

which part, about the fake raid, or about adding disks to arrays?

https://ata.wiki.kernel.org/index.php/SATA_RAID_FAQ

the only real raid is the kind you need a plug-in controller for.

as for adding disks to windows raid arrays, i'm only going by what i remember from school, and i could be wrong, but i'm almost positive it can be done.

now there's one thing i didn't mention, and that is that this would only work if the array isn't the system (boot) volume... but i don't think that'll be a problem because you normally can't install windows on a software raid array because you can't build the array before installation.

Quote from bunder9999 :

which part, about the fake raid, or about adding disks to arrays?

Sorry, I should have been more clear. I was talking about adding drives to an existing SoftRAID using Windows Disk Management.

Quote from bunder9999 :

now there's one thing i didn't mention, and that is that this would only work if the array isn't the system (boot) volume... but i don't think that'll be a problem because you normally can't install windows on a software raid array because you can't build the array before installation.

It's quite easy to create a bootable SoftRAID. Most of the time you can just use a bootable floppy or USB drive.