> Use smartctl to get a count of remapped sectors and run tests. Modern > disks hide bad sectors by remapping them. If you have a large number of > remapped sectors its time to get a different disk.
Clear, but I'd like to point out that this won't suffice, i.e. you could have a failed disk that didn't previously show any problem. I'm quoting "Failure Trends in a Large Disk Drive Population", by E. Pinheiro et al, presented at 5th USENIX Conference on 2007 and available at labs.google.com/papers/disk_failures.pdf : "Our results are surprising, if not somewhat disappointing. Out of all failed drives, over 56% of them have no count in any of the four strong SMART signals, namely scan errors, reallocation count, offline reallocation, and probational count. In other words, models based only on those signals can never predict more than half of the failed drives." So, if you have some or any of these parameters bigger than zero and increasing, you'll almost certainly have a disk media problem in the near future, but the converse isn't true, and you cannot say "I have no S.M.A.R.T. signal so the disk is still good". _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
