RAID Tips 9 of 10 - Monitor the RAID performance

The ability of the RAID to handle failures of its hard drives relies on redundancy of the storage. Once redundancy is lost because of the first drive failure, the human intervention is needed to correct the problem and restore the required level of redundancy. Redundancy is to be restored quickly, or otherwise there is no point in having the RAID at all. However, you do not know when to act if you do not monitor the array and disks often enough.
  • Regularly check the SMART status on the drives using the appropriate software. With a software RAID, use SpeedFan or HDDLife. With a hardware RAID, use the vendor-supplied monitoring software.

  • Any unexplained drop in the throughput may indicate a problem with one of the hard drives.

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