If you are duplexing a HiRDB file system area using a mirror disk, specify the following information:

• 3050RX group or 3500/3xx
  Specify in the pdfmkfs command the name of the character special file on the master disk (/dev/rdsk/rdskxxx) or the name symbolically linked to it.
  
• 3500 series (except 3500/3xx)
  Specify in the pdfmkfs command the mirror special file name (/dev/mirror/rdskxxx) or the name symbolically linked to it.