# FID

FID is an acronym for frame-ID, which is the unique identifier
to each virtual frame on the disk.

Frames begin at frame 1 and end at the last addressable
frame (called maxfid).

## See also

- [ABS](https://d3codex.com/definitions/abs/)
- [Frame](https://d3codex.com/definitions/frame/)
- [Maxfid](https://d3codex.com/definitions/maxfid/)
- [Scrubber](https://d3codex.com/definitions/scrubber/)
- [Sysbase](https://d3codex.com/definitions/sysbase/)
- [u401c user exit](https://d3codex.com/proc/u401c-user-exit/)

---
Source: https://d3codex.com/definitions/fid/ - part of the D3Codex reference.