Can you "expand" a RAID5 Array?

I had another post earlier about not being able
to hook up a 2.73TB RAID5 Array to a win2k file server
so I'm using a 1.82TB RAID5 Array with disks 6 and 7
on a bank being idle.
Now can I add disk 6 and 7 to the 1.82TB Array and
get a full 2.73TB Raid5 array without deleting
the original array?
I'm inclined to think no, but wanted to make sure.
Thanks,
Tadashi

Cool, I found the expansion function on RAID Admin
The problem with the 2 TB limit on win2k server might be resolved with one of two ways:
upgrade to win2k3 or
since the IBM x335 hw is ~4 years old, a newer x336 hw
may be able to handle >2TB volumes
I'm not really sure if the 2TB vol limit is OS related
or hw (MotherB, Bios, HBA) limitation so I'll probably
just to do some trial and error. I'm finding stuffs
pointing both ways on the internet.
But your point about HFS+ not supporting volume expansion also means that ntfs probably will not either.
bummer, but more reasons to go to some type of SAN.
Thanks for your help,
Tadashi

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