On 05/01 09:45 , Les Mikesell wrote: > Things like that aren't as unusual as you might think. What often happens is > that unused parts of some of the disks go bad and aren't noticed immediately > - > then when a used area on one does have a problem it tries to rebuild on a hot > spare but in the process of building parity across all the sectors it hits > the > bad spots on the other drives. Or, if it is really a controller problem it > can > affect several disks at once.
Other things that cause multiple near-simultaneous failures are: - Environmental causes. If the case gets too hot; it can cook several drives. - Vibration. Bearing goes bad on one drive, and the resultant vibration causes cascading failures. - Human intervention. Drive goes bad, you crack the case and wiggle a drive out. This disturbs the connections on other drives enough that they die too. Several storage manufacturers (IBM & Xiotech come to mind) are proposing that dead drives should simply be abandoned in place and new disk packs added on to the array when necessary. -- Carl Soderstrom Systems Administrator Real-Time Enterprises www.real-time.com ------------------------------------------------------------------------------ _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
