Re: Expanding/rebuilding a RAID0 array

From: John-Paul Stewart (jpstewart_at_binaryfoundry.ca)
Date: 09/25/04 

Date: Sat, 25 Sep 2004 11:21:25 -0400

Rohan Beckles wrote:
> Hello --
>
> I have just purchased 2 WD2500JD 250GB SATA hard disks, with the
> intention of building a RAID0 array. I haven't bought the controller
> yet. At some point in the future, I would like to add another 250GB
> hard disk.
>
> Is it possible to dynamically expand a RAID0 array in this fashion?
> Is it supported in Linux RAID, or would I have to buy a hardware RAID
> controller?

Linux software RAID doesn't currently support adding drives to a RAID-0
array. (It's only supported for RAID-1.) A true hardware RAID card
should support that, although many so-called SATA RAID cards are _not_
true hardware RAID. The 3Ware cards are all good, as is the LSI Logic
MegaRAID SATA 150-4. The true hardware RAID cards are lot more
expensive than some of the other "fakeraid" cards.

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