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I have a IBM server. This server contains 3 hard disk with RAID 5. It was working fine earlier. Unfortunately this machine got the following error message. After that I have rebooted the systems. After that I am getting the following error message in kern.log and demsg

kernel: [65896.678870] end_request: I/O error, dev sda, sector 17430271
kernel: [69263.783957] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK : [69263.783957] sd 0:0:0:0: [sda] Sense Key : Hardware Error [current]
kernel: [69263.783957] sd 0:0:0:0: [sda] Add. Sense: Internal target failure

Whether it is kernel problem or hard disk problem or Raid problem

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If looks like hard drive prpblem to me.

Your hard disk sda, which I believe is the first hard drive, is having errors. Replacing the hard drive should fix this issue.

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