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Does a RAID 0 of two SSDs have to be exactly the same drive, or just the same size?

post #1 of 7
Thread Starter 
I have a 30G Kingston SSD, which is my boot device, but it's like 95% full. I don't have the money to buy a whole lot bigger drive, but I could swing another 30G drive. So make it so that it's seen as one big drive, I was thinking of using the RAID built into my Gigabyte P55A-UD4P motherboard. But would they have to be exactly the same drive, or could I RAID a Kingston 30G SSD and a OCZ 30G SSD?

thanx

Dirkmaster
post #2 of 7
Quote:
A RAID 0 can be created with disks of differing sizes, but the storage space added to the array by each disk is limited to the size of the smallest disk. For example, if a 100 GB disk is striped together with a 350 GB disk, the size of the array will be 200 GB.

Full article: http://en.wikipedia.org/wiki/Standard_RAID_levels#RAID_0

Both have the same size, so, not problem there BUT speed is limited to the lowest SSD. Keep in mind that maybe you have to reinstall the OS for create the RAID.
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post #3 of 7
Thread Starter 
My plan was to do an Acornis True Image image backup of the existing drive, then build the RAID 0 of the 2 SSDs, then boot on the Acronis boot disk and restore to the RAID. Anyone see a problem with that plan? thanx for the feedback, saint19. That was exactly what I was looking for. DirkMaster
post #4 of 7
Nope, imaging should work. That's how I maintain my RAID0 array.

Not sure if TRIM will carry over, but its easy enough to verify / turn back on.
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post #5 of 7
Should work fine with no issues. thumb.gif FYI - You normally lose TRIM when you RAID SSD's but if the garbage collection is good, you won't see a difference.
post #6 of 7
Quote:
Originally Posted by Dirkmaster View Post

My plan was to do an Acornis True Image image backup of the existing drive, then build the RAID 0 of the 2 SSDs, then boot on the Acronis boot disk and restore to the RAID. Anyone see a problem with that plan? thanx for the feedback, saint19. That was exactly what I was looking for. DirkMaster

That plan should work as the other users says, my only experience with RAID arrays is on servers where the thing is a little different. Let us know how this work.
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post #7 of 7
Quote:
Originally Posted by saint19 View Post

Both have the same size, so, not problem there BUT speed is limited to the lowest SSD.

Even if they were different sizes, it wouldn't cause a problem anyway. But it will only match the size of the smallest drive. So if you have a 30GB and 40GB SSD, throw them in a raid 0, you'll only have a 60GB volume. It will only use 30GB of 40GB drive, with 10GB wasted. Since a raid 0 spreads data evenly across the disks, it can only use the same amounts on each drive.

Just wanted to clarify that it wouldn't be a problem even if they were different sizes. But, like you said, it'll only be as fast as it's weakest link thumb.gif
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