I probably did something that doesn’t work like preserving ownership or something.

I guess tho’ what I was asking was by the time 11 drives have gone, are you right in the busy part of the bell curve? Would you preemptively replace a pack of drives after, say, half a dozen had gone? Or swap a few around between Thumpers to mix it up a little? Or has Sun thought of all this and done some mixing of its own? Or is it all really a non issue because the lease will have expired before even 2 or 3 drives have gone?

Like I said, just asking out of interest.

raidz2 c{5,4,7,6,1,0}t4d0 c{4,7,6,1,0}t0d0 \ {can lose 2; notice how it cuts across controllers}raidz2 c{5,4,7,6,1,0}t5d0 c{4,7,6,1,0}t1d0 \ {can lose 2; notice how it cuts across controllers}raidz2 c{5,4,7,6,1,0}t6d0 c{4,7,6,1,0}t2d0 \ {can lose 2; notice how it cuts across controllers}raidz2 c{5,4,7,6,1,0}t7d0 c{4,7,6,1,0}t3d0 \ {can lose 2; notice how it cuts across controllers}spare c5t{1,2,3}d0 {three hot spares}

We can lose 8 drives (across 4 double parity groups), but then also have 3 hot spares (and hot does mean that they’ll just take over in case of a failure and resilver).

So of the 46 drives (substract 2 from the 48 that are kept out for boot and boot recovery), we can lose 11 drives before it would be a good idea to head in and replace some drives.

Also there’s no controller cabling or the like to fail because of the design.

Then in the case of containers, add mirroring across thumpers to that … and we’re pretty comfortable with the setup.