2009/8/4 mcclnx mcc <mcc...@yahoo.com.tw>: > > we have CENTOS 4.X on DELL server and one one of virtual disk include 4 disk > configure as REID5 (one more disk for hot spare). I saw /var/log/messages > file have: > > Aug 4 06:27:02 host1 Server Administrator: Storage Service EventID: 2094 > Predictive Failure reported: Physical Disk 1:5 Controller 0, Connector 1 > Aug 4 06:27:02 host1 Server Administrator: Storage Service EventID: 2051 > Physical disk degraded: Physical Disk 1:5 Controller 0, Connector 1 > > I use DELL OPMN to check and found "disk 1:5" still "online", but "predicate > failure". > > I also use DELL OPMN to check virtual disk and it show "online", not > "degrade". > > my questions are: > > 1. is this disk really "degrade" or not? > > 2. how O.S. can predicate disk going to failure?
There are several possibilities, the most likely being that the drive's predict-fail bit flipped, or the # of sectors available for reallocation dropped below the manufacturer's recommended threshold. The following links have additional information on drive failures, and how to use SMART data to look at drive health: http://www.usenix.org/events/fast07/tech/schroeder/schroeder_html/index.html http://prefetch.net/articles/diskdrives.smart.html Thanks, - Ryan -- http://prefetch.net _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
