Error en pfsense 2.3.4-RELEASE (amd64)

[earth2380]

saludos

tengo este error en

pfsense 2.3.4-RELEASE (amd64)
built on Wed May 03 15:13:29 CDT 2017
FreeBSD 10.3-RELEASE-p19

Jun 4 10:13:03 kernel (ada0:ata3:0:0:0): CAM status: ATA Status Error
Jun 4 10:13:03 kernel (ada0:ata3:0:0:0): ATA status: 51 (DRDY SERV ERR), error: 40 (UNC )
Jun 4 10:13:03 kernel (ada0:ata3:0:0:0): RES: 51 40 73 64 56 14 14 00 00 04 00
Jun 4 10:13:03 kernel (ada0:ata3:0:0:0): Error 5, Retries exhausted
Jun 4 10:13:03 kernel g_vfs_done():ufsid/590651c39b1507b0[READ(offset=174697496576, length=4096)]error = 5
Jun 4 10:13:03 kernel vnode_pager_getpages: I/O read error
Jun 4 10:13:03 kernel vm_fault: pager read error, pid 3480 (rrdtool)
Jun 4 10:13:03 kernel Failed to write core file for process rrdtool (error 14)
Jun 4 10:13:03 kernel pid 3480 (rrdtool), uid 0: exited on signal 11

se que es referente al disco duro pero que lo causa?????