On Fri, 2007-03-02 at 11:34 +1100, Craig Dibble wrote: > > > It may well be that spelling it out like this makes it look obvious > what > the problem is, but since the results I was getting seemed to be > contrary to popular wisdom, and to any documentation I have read, I > had > a hard time trying to explain what I was seeing. Hand-waving aside, I > think this explanation fits the bill.
I dont, because you have ignored the parallelism in each spindle. With 10 disks, doing 10 writes, one per disk, should take precisely as long as 5 disks, doing 5 writes, one per disk, as long as you have bandwidth on your SCSI bus. -Rob -- GPG key available at: <http://www.robertcollins.net/keys.txt>.
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