I don't think it exists any more. It was last published in 2009.  I checked again,  but seems it's removed. 
 
It was a general  IO workload generator created internally by NetApp. 
 
IOMeter is probably more standard tool for testing workload generations. For linux, I think there are multiple tools under free-bsd that does that kind of job.  You can look up for - fio.
 
Thanks!