After noticing a high load on our virtual root server (2 x 1 TB RAID 1 Subset) I have found these messages in /var/log/messages (CentOS):
kernel: ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
kernel: ata3.00: failed command: WRITE DMA
kernel: ata3.00: cmd ca/00:10:e0:1b:01/00:00:00:00:00/e1 tag 18 dma 8192 out
kernel: res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
kernel: ata3.00: status: { DRDY }
kernel: ata3: hard resetting link
kernel: Clocksource tsc unstable (delta = -25761696872 ns)
kernel: ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
kernel: ata3.00: configured for UDMA/100
kernel: ata3.00: device reported invalid CHS sector 0
kernel: ata3: EH complete
Could please someone bring some light in it? Is it a serious hdd problem or something else? How can I check the health of the virtual hdd (without SMART capability)?