[SunHELP] Drive type Unknown

[vinod kumar]

Hi 
 
I am getting the following error when I give format
 

AVAILABLE DISK SELECTIONS:
       0. c0t12d0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
          /sbus at 3,0/SUNW,fas at 3,8800000/sd at c,0
       1. c0t13d0 <drive type unknown>
          /sbus at 3,0/SUNW,fas at 3,8800000/sd at d,0
       2. c1t10d0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
          /sbus at f,0/SUNW,fas at 3,8800000/sd at a,0
       3. c1t11d0 <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
          /sbus at f,0/SUNW,fas at 3,8800000/sd at b,0
       4. c2t0d0 <SUN36G cyl 24620 alt 2 hd 27 sec 107>
          /sbus at e,0/QLGC,isp at 2,10000/sd at 0,0
       5. c2t1d0 <SUN36G cyl 24620 alt 2 hd 27 sec 107>
          /sbus at e,0/QLGC,isp at 2,10000/sd at 1,0

 
How will I eliminate the error.
 
Thanks
Vinod