100% agree with Gustin. RAID-6 or just close your eyes and hope for the best.
On 14-05-31 08:30 PM, Gustin Johnson wrote: > Without getting too deep into the technical side of things, the short short > overview I think a lot of people have intuitive problems with RAID risk exposure. Modern disks are ridiculously reliable but .... Many people consider that a "One in a million" risk is close enough to negligible (zero) risk. But a terabyte is a million million so "One in a million" would typically mean around 1 million errors per terabyte. The high reliability of modern disk has a lot to do with manufacturing consistency. The disks in your RAID probably came off the production line with consecutive serial numbers. This implies they are likely to fail at nearly the same time. Worse if there is a design/production problem, it is may reveal at nearly the same time in all the drives. RAID5 makes the disks work hard to rebuild. Not the best tine to stress test your array. Don't make Grandpa run is a good rule with tired old (weakening) drives. Me I really appreciate the extra wish that RAID-6 gives, especially if the problem is due to some local environmental deal like bad climate control or a power BLAM! With disk replacement, never used drives that have been in storage for years tend to be less reliable than drives that were spinning for all that time. _______________________________________________ clug-talk mailing list clug-talk@clug.ca http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying
