[ale] dd - how long should it take?

[Doug McNash]

Right, a block size on the order 1-4 Mb.  Without testing I would use
1/2 the cache size or some multiple of cylinder size.

> If you have to run it again, I'd try with a bigger block size.  Just 
> make sure its a multiple of 512bytes for best results. Also I remember 
> using ufsdump | ufsrestore (not that exact command) on my ultra30 with 
> 2x7200rpm 9giggers that didn't take anywhere near 5 hours.