On my previous 32-bit system, I would get fsck run on filesystems every so-many mounts. Was using ext3 with some ext4 extensions. Could take a bit on multi- hundred gig partitions but assumed a necessity to keep things playing. On my new 64-bit system with ext4 filesystems, I have yet to see fsck run. Is the periodic fsck obsolete or unnecessary on ext4 filesystems? If it is, in fact, needed, how might I enable it?