Hi Nayab,
Some of the links are within partner area, so I believe your NOW account is end-user one, hence you cannot access it.
You can find reallocate manual here though on p. 480:
https://library.netapp.com/ecm/ecm_get_file/ECMP1120818
When you run reallocate measure you should get an output at the end specifying the level of fragmentation. If you didn't notice that, the previous check is saved and may be viewed by running reallocate status, rather than running reallocate measure once again.
As per the doc quoted above:
"The threshold when a LUN, file or volume is considered unoptimized enough that a reallocation should be performed is given as a number from 3 (moderately optimized) to 10 (very unoptimized)."
regards,
Radek
