Power Down needed for adding extra disk

I have a sun netra 240 which currently has one 72GB disk, I am adding an extra 72GB disk, my question is do I need to power down the server to insert the new disk or can I insert it while power is on ?
[261 byte] By [johncon] at [2007-11-16]
# 1
You do not need to power the server off to insert the new disk, this can be done live. The only thing you might have to do is run devfsadm after inserting the disk.
stumoor at 2007-7-5 > top of java,Sun Hardware,Other Sun Hardware...
# 2
Thought that was the case but needed clarrified, I was going to run devfsadm after disk insertion. Thanks for the help.
johncon at 2007-7-5 > top of java,Sun Hardware,Other Sun Hardware...