Nice job.  In general, I personally suggest though not using root.  Instead you should consider creating a separate account as mentioned earlier.  Then yes as you noted the syntax will be:  -sa :<128-bit/16 char string> 
HI Team  I am in need of your advise here. I plan to use isi_vol_copy for my data migration approach from NetApp to Isilon. I was told that there is a limitation to this. isi_vol_copy can only have ONE session per filer. Is this correct? So, does this mean, if I have 6 filers to migrate from, I can run 5concurrent isi_vol_copy sessions, one session per-filer? Please advise if this is possible or I can only run one session at a time?  I am hoping to hear 1 session per filer concurrently. [IMAGE] 
ISI_VOL_COPY limitations?