Nix wrote:
[]
> With iflag=direct I get, um,
> 
> loki:/var/log# time dd if=/dev/md1 bs=1000 count=502400 of=/dev/null 
> iflag=direct
> dd: reading `/dev/md1': Invalid argument

For direct i/o, you have to use blocksize =512, 1024, ... - multiple of a 
sector size.

/mjt
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