Do the replace if you can. On the other hand these are ‘only’ read errors which is not that bad. If you write to that sector then you can be only sure if it has defects. I would run the vendors utility to check (they also run smart tests) if it has problems. They usually … Read more
The system is running very slowly because it has to reconstruct the missing data which involves additional CPU and I/O. If you have a missing disk in a RAID-5 configuration you have no recovery strategy. If another disk goes down you will lose your data. Run, don’t walk, to the nearest vendor from which you … Read more
It’s a waste of time. You won’t be able to induce failure or stress the drives in a meaningful manner. You have RAID, and that’s a good start. Just make sure you have monitoring in place to actually detect failures as they occur and backups to protect against disaster.
A URE is an Unrecoverable Read Error. Something has happened that has caused the reading of a sector to fail that the drive cannot fix. The drive electronics are sophisticated, they will only pass the data up if they have been able to read it correctly from the disk. The drive electronics will try multiple … Read more
Drive manufacturers specify the reliability of their products in terms of two related metrics: the annualized failure rate (AFR), which is the percentage of disk drives in a population that fail in a test scaled to a per year estimation; and the mean time to failure (MTTF). The AFR of a new product is typically … Read more
How important is it to burn in a hard drive before you start using it? If you have a good backup, and good high-availability systems, then not very much. Since restoring from a failure should be pretty easy. How do you implement a burn-in process? What software do you use to burn in drives? How … Read more