Sun has qualified a new, 10,000 rpm, 72 gig Fujitsu drive. The
 manufacturing part number for the disk is 390-0098, and the FRU
 part number for the disk is 540-5408. The disk is currently qualified
 for use in the Netra 20, SunFire v480 and v880 servers.

 The drive uses a different wwn scheme than drives previously used
 by Sun. This may introduce some confusion when using traditional
 techniques to verify multipathing conditions are available.

 Lets look at a simple working example within a V880. The system
 has one Seagate disk in slot 0. There is also a crystal plus card
 in slot 8 providing a second path to the drive.

 luxadm display :
  SLOT      DISKS             (Node WWN)
   0      On (O.K.)         2000002037bd3f11

 format:
   0. c1t0d0 <SUN18G cyl 7506 alt 2 hd 19 sec 248>
      /pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w2100002037bd3f11,0
   1. c2t0d0 <SUN18G cyl 7506 alt 2 hd 19 sec 248>
      /pci@9,600000/pci@2/SUNW,qlc@4/fp@0,0/ssd@w2200002037bd3f11,0

 Important Points:
   a. luxadm reports a WWN of 2000002037bd3f11
   b. luxadm prefaces the wwn with a "20".
   c. format changes 20 to 21 (ssd@w21) for the A loop path.
      This is the onboard data path.
   d. format changes 20 to 22 (ssd@w22) for the B loop path.
      This is the crystal + card data path.
   e. The last 14 digits remain unchanged. Its easy to look
      at the WWN 's in format and visualize them as the same
      disk.

 Now lets add the new Fujitsu disk to the mix. The disk is
 added to slot 1 in the v880. Look at the outputs now.

 luxadm display :
  SLOT      DISKS             (Node WWN)
   0      On (O.K.)         2000002037bd3f11
   1      On (O.K.)         500000e010124620

 format:
   0. c1t0d0 <SUN18G cyl 7506 alt 2 hd 19 sec 248>
      /pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w2100002037bd3f11,0
   1. c1t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
      /pci@8,600000/SUNW,qlc@2/fp@0,0/ssd@w500000e010124621,0
   2. c2t0d0 <SUN18G cyl 7506 alt 2 hd 19 sec 248>
      /pci@9,600000/pci@2/SUNW,qlc@4/fp@0,0/ssd@w2200002037bd3f11,0
   3. c2t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
      /pci@9,600000/pci@1/SUNW,qlc@4/fp@0,0/ssd@w500000e010124622,0

 Important Differences:
  a. luxadm reports a WWN of 500000e010124620.
  b. luxadm prefaces the wwn with a "50" instead of "20"
     The "50" will never change when the WWN is viewed in format.
  c. The WWN of the disk will always end in "0" from luxadm.
  d. The WWN of the disk ends in "1" for the A loop data path.
  e. The WWN of the disk ends in "2" for the B loop data path.

 These are NORMAL outputs for the disk! The prefixed naming
 convention of "20, 21 and 22" is gone. The value will always
 be 50. The last digit of the disk will determine the data
 path the drive is being accessed from. "1" is  an A loop path,
 "2" the B loop path. 

 The disks will work with multipath software such as Veritas Volume 
 Manager. Techniques described in FIN IO-790 may apply.