Recovering from dirty power down on N5200PRO

Ok, so I lost my cool and reached for the power switch at the back :P. Restarting it put it into Recovery mode. My NAS has one raid5 partition with 2018.7 GB / 2698.3 GB used. The only data being written at the time of the dirty power down is stuff I don't care about (basically MySQL db tables). How long is the rebuild likely to take?

Dear Sir,

On N5200 PRO RAID5 creat/rebuild speed around 80GB per hour, thus 2698.3GB would take about 33~34 hours.

Yvon.