On 7/18/06, Bill Sommerfeld <[EMAIL PROTECTED]> wrote:
On Tue, 2006-07-18 at 15:32, Daniel Rock wrote: > > Stop right here! :) If you have a large number of identical disks which > > operate in the same environment[1], and possibly the same enclosure, it's > > quite likely that you'll see 2 or more disks die within the same, > > relatively short, timeframe. > > Not my experience. I work and have worked with several disk arrays (EMC, IBM, > Sun, etc.) and the failure rates of individual disks were fairly random.My observation is that occasionally -- very occasionally -- you will get a bad batch of disks, which, due to a subtle design or manufacturing defect, will all pass their tests, etc., run fine for some small number of months or years (and, of course, long enough for you to believe they're ready for production use..), and then start dying in droves. The paranoid in me wonders whether it would be worthwhile to buy pairs of disks of the same size from each of two different manufacturers, and mirror between unlike pairs, to control against this risk... - Bill
well feel free to contact the system builders and sell them on your idea, of how they should procure and install the drives from multiple venders perferably from different lots, into the x4500, they will love the extra hassle ;-p James Dickens uadmin.blogspot.com
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