> Feb 24 18:40:43 mbrc20 kernel: attempt to access beyond end of device > Feb 24 18:40:43 mbrc20 kernel: sda: rw=0, want=40017743, limit=39062500 Disk corruption of some sort, or possibly bad ram (a common trigger for that). Boot single user, force an fsck of each file system. Maybe also run a memtest86 check