When you have a large volume and you want to control when file system checks are done, you can disable interval checks by issuing the following command:

# tune2fs -i 0 /dev/sdax

I have had reboots take a long because the interval was up for a 2TB partition. I have disabled it and will do them at my own time choosing.

Update: You can do this permanently by changing the sixth field in /etc/fstab file for the volume/partition.