On Sun, 29 Jul 2012, Jim Klimov wrote:

 Would extra copies on larger disks actually provide the extra
reliability, or only add overheads and complicate/degrade the

My opinion is that complete hard drive failure and block-level media failure are two totally different things. Complete hard drive failure rates should not be directly related to total storage size whereas the probabily of media failure per drive is directly related to total storage size. Given this, and assuming that complete hard drive failure occurs much less often than partial media failure, using the copies feature should be pretty effective.

 Would the use of several copies cripple the write speeds?

It would reduce the write rate by 1/2 or by whatever number of copies you have requested.

Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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