Extending RAID 5

[William O'Higgins Witteman]

I have a Dell PowerEdge 6800 server which is set up with 3 drives in a
hardware RAID 5.  I need to increase storage capacity on this machine,
and I have 3 more drives.  What do I do?

1. Do I just plug in the drives hot and hope for the best? (I don't see
how that could work.)

2. Do I boot into the RAID utility and extend the existing RAID.  If
this works, how do I explain to Linux what is happening?

3. Do I boot into the RAID utility and extend the existing RAID and then
reinstall?

Any advice would be appreciated - I didn't choose the server, and I
don't know RAID.  Thanks.
-- 

yours,

William

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