Kernel Error: pve-2.6.32-18

Hi, I have a RAID-5 with multipath and I have this kernel error. Always in prompt.

end_request: I/O error, dev sdc, sector 0
end_request: I/O error, dev sdd, sector 0
end_request: I/O error, dev sdg, sector 0
end_request: I/O error, dev sdh, sector 0

Somebody knows how resolve it?

Thanks,

Fernando Sierra.