Isn't raid1 obsolete by raid10 module?

Isn't raid1 obsolete by raid10 module?

[Michael Tokarev]

Just out of curiosity.  It looks like raid10 module
provides all the functionality of raid1 too.  For
example, for a 2-component raid1 array, the two:

 mdadm -C -l1 -n2 /dev/md1 /dev/sda1 /dev/sdb1

and

 mdadm -C -l10 -n2 -ln2 /dev/md1 /dev/sda1 /dev/sdb1

will create the same array.  Ditto for e.g 3-component
raid1:

 mdadm -C -l1 -n3 /dev/md1 /dev/sd{a,b,c}1

and

 mdadm -C -l10 -n3 -ln3 /dev/md1 /dev/sd{a,b,c}1

will do the same.

Shouldn't raid1 module be removed from kernel? :)

/mjt