-----Original Message----- From: Per Jessen [mailto:per@computer.org] Sent: Fri 3/24/2006 9:12 AM To: suse-linux-e@suse.com Subject: Re: [SLE] Optimal RAID setup - opinions invited.
I have no idea of the actual probability of a 2nd drive failing during the rebuild, but the more drives the higher the risk.
Well I can tell you from first hand experience, if all of the drive were purchased at the same time, have all been running in the same machine for the same amount of time, and have all been accessed around the same amount of times, your chances of a second drive failing during a rebuild is very high. Especially if you are getting close to the hard drives MTBF. On two different machines I had a second drive, of an eight drive array, fail during a rebuild. The SCSI drives in both servers were on their fourth year of five year MTBF rates. Both servers were purchased at the sime time and both arrays crashed withing two months of each other. Ken