Hi there,
Reviewing the IMT - there is not a version of Santools which runs on HP-UX 11.11 which will work with the oldest OS which can run on an AFF-A300.
The only versions I see will only support 7-mode, which the A300 does not support. From memory, 7-mode LUNs will present slightly differently, so I believe that would be a hard stop on using older versions. HUKs usually do things like set timeout values, multipathing etc, so hopefully it's ok without it.
If you do still need HP-UX hostutils 5.2, please send me a message with your NetApp account representative's name and your corporate contact details, and I'll see what we can do.