A very large more area active double clad optical waveguide doped with Nd3+ at a concentration of at least 0. The systems and methods utilize low energy proton cyclotrons to produce 124I by the 124Te reaction from enriched Al2Te3 glassy melts. After a first node attempts to complete a write request at a second node and is unable to complete the request, the first node ceases responses to interactions from other nodes. The pack arm assembly is disposed adjacent the tape reel assembly and includes a pack arm and a pin.