understanding the DT and SV attributes

Hello -

Here is the output from symdev -sid xxxx list -all -wwn.  Can anyone please tell me what does DT and SV standfor?

        Device Name                               Device

---------------------------- --------------------------------------------------

Sym   Physical               Config       Attr WWN

---------------------------- --------------------------------------------------

000C5 Not Visible            RAID-5       (DT) 60000970000192600783533030304335

000C6 Not Visible            RAID-5       (DT) 60000970000192600783533030304336

005E6 Not Visible            2-Way Mir    (SV) 60000970000192600783533030354536

005E7 Not Visible            2-Way Mir    (SV) 60000970000192600783533030354537

Thank you.