not, then only the amount of space available on the smallest device is
used (any extra space on other devices is wasted).
+Note that the read balancing done by the driver does not make the RAID1
+performance profile be the same as for RAID0; a single stream of
+sequential input will not be accelerated (e.g. a single dd), but
+multiple sequential streams or a random workload will use more than one
+spindle. In theory, having an N-disk RAID1 will allow N sequential
+threads to read from all disks.
+
.SS RAID4
A RAID4 array is like a RAID0 array with an extra device for storing