Abbreviated as: DISS
A type of single-write Information Storage Structure. Original designs were meant exclusively for high density data meant to be truth as written (not intended to need revisions often if ever), such as archiving. This type of information storage was a core part of the Galactic Communication Network. The diamonds used for this type of structure were all synthetically made to reduce imperfections and data corruption.
Eventually Diamond ISSs found use in smaller devices. The need for rewrites was handled by having long sticks of diamond for the structures. As data filled up one end of the stick, rewrites would just be added as a new write operation further along the stick. Data tables are updated to point to the new points in the structure as needed. Most handheld devices have multiple smaller sticks which are inserted sequentially to keep a steady information path. Once the last one starts running out of usable space it will copy over any still in use data (that is anything not already part of a rewrite operation that's on a new stick) and eject the stick. A new stick is manually inserted. Larger devices were run off of cubes which could be poured into the device in bulk and sorted internally.
Use DISSs would be recycled in bulk. The primary applications were either to be ground up and used in diamond dusting for industrial cutting, or being roughly crushed and used to strengthen space ship components. This gave rise to the idea of Spaceships are Human Memory.