5i Array Extension taking it's time

So I have a DL380 G3 with a 5i array controller running Netware 6.5 SP6 in it the disks were configured as 4x 36.4 10K disks Raid 5 with online spare. Since I am now out of space I have booted into the smart start acu removed the online spare added an two additional 36.4 and kicked off the array expansion this was early on Sat morning after more then 27 hours it's still going any idea how long this can go on for. Also what get out options do I have, ideally this server needs to be back up and running in the morning (Mon) I take it if I reboot before it completes there is no chance of the OS booting and it been usable?

FYI: The server does not have a BBWC installed!

Thanks for any input