What are you're system specs? and have you recently changed anything hardware/software wise on you're system? The dumps are stating the HD is what is causing the problem. I'd check the cabling to ensure everything is connected properly, unless is a laptop.
IO_ERROR: (NTSTATUS) 0xc000000e - A device which does not exist was specified.
EXCEPTION_STR: 0xc0000006_c000000e
FAULTING_IP:
+fc
75b7b421 ?? ???
BUGCHECK_STR: 0xF4_IOERR_C000000E
FOLLOWUP_IP:
+fc
75b7b421 ?? ???
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: hardware_disk
IMAGE_NAME: hardware_disk
I'd guess it's that you're HD is about to die. But I'm not 100% on that it could be other things as well.