> # time dd if={somelarge}.iso of=/dev/null bs={readahead size}
>
> /dev/sd?
> 1024 71.3 MB/s
> 2048 71.2 MB/s
> 4096 77.7 MB/s
> 8192 69.4 MB/s
> 16384 76.6 MB/s
>
> /dev/md2
> 1024 67.1
> 2048 69.1
> 4096 75.7
> 8192 64.9
> 16384 69.0
>
> Using RAID10offset2 on 2 WD 2TB drives, and always the same input file.
RAID10 on 2 drives? Are you striping partitions on a single drive?
You won't get much of a performance boost that way.
> Why would RAID10 performance be -poorer-?
> If it weren't for mirroring, this wouldn't be worth it.
Is this with all drives local, or are you mirroring across a Gig-E link, as
I believe you said you were going to do?
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