On the lvconvert(8) man page it says:

```
--type SegmentType
       Used to convert a logical volume to another segment type  or  to
       explicitly  state  the  desired  RAID1 segment type ("mirror" or
       "raid1") when converting a linear logical  volume  to  a  mirror
       with the '-m' argument.

```

But what exactly is the difference between "mirror" and "raid1"?