Replacing smaller drive with larger drive in RAID: Is it automatically short-stroked?

[Mike Texter]

Curious as to whether a particular disk drive gets short-stroked automatically if for example, we replace a 750GB disk with a 1TB disk in a raid array.  I am under the assumption that the controller will begin the rebuild at the outermost tracks, and stop when it gets to the 750GB mark, therefore not utilizing the innermost, slowest disk sectors and effectively short-stroking this disk, making it just a bit faster.  Is this the case?  Does it work with most storage systems this way natively?  Is there any reason this wouldn't happen in the way I described?

Thanks!