attempt to access beyond end of device

[Mike -- EMAIL IGNORED]

My minimal FC7 box has 125M ram, 20G hard drive, 400 MHZ. I have been 
successfully using it for a web server. Suddenly it began doing
the sort of thing shown below.  I know neither what starts in nor how
many there are, but my /var/messages file exceeds 1G.  I am guessing
that there is some limit parameter somewhere that I can set.

Any suggestions?

Thanks,
Mike.

Feb 24 18:40:43 mbrc20 kernel: device-mapper: ioctl: 4.11.0-ioctl 
(2006-10-12) initialised: dm-devel at redhat.com
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
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
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=39923925, limit=39062500
Feb 24 18:40:43 mbrc20 kernel: Buffer I/O error on device dm-1, logical 
block 131056
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=39923925, limit=39062500
Feb 24 18:40:43 mbrc20 kernel: Buffer I/O error on device dm-1, logical 
block 131056
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