Originally Posted by drManhattan
I/O write (sdb1) - 538MB dd if=/dev/zero of=/dev/sdb1 bs=104857600 count=10
I/O write (sdb) - 138MB dd if=/dev/zero of=/dev/sdb bs=104857600 count=10
I/O read (sdb1) - 1.1GB dd if=/dev/zero of=/dev/sdb1 bs=104857600 count=10
I/O read (sdb) - 154MB dd if=/dev/zero of=/dev/sdb bs=104857600 count=10
Could you explain what the above table means? The speed figures, are those supposed to be MB/second or GB/second as reported by dd, or did you measure the speed some other way?
I see no difference between your read and write commands. To read, I think you would use something like this:
dd if=/dev/sdb of=/dev/null bs=104857600 count=10