1. Guaranteed fast, guaranteed safe recording method
Timely Safe Recording
Guaranteed fast, guaranteed safe recording method

2. What is TSR? Based on drives with Hardware Defect Management
2 phases recording
Postponed defect management
Fastened write with verify

3. State diagram of TSR

4. Linear replacement or software reallocation
For usual data:
User space
Spare Area
Linear replacement
Sequentially recorded
For stream data:
User space
Spare Area
Video Chunk
Software reallocation

6. FAQ Phase differentiation on POW When to report errors
Memorizing bad ECCs
Software reallocation – not too hard?
Random recording
Confidential concerns
TSR is a known acronym from DOS

7. Comparison table Hardware defect management Software defect management
Hardware defect management
Software defect management
Timely Safe Recording
Quality of defect detection
Good
Poor
Time spent in seeking
High/Medium
Medium
Low
Streaming with defect management (software reallocation)
Impossible
Possible
Fast defect management (sequential writing of spares) No
Yes
Seamless playback
Cost to Host memory
High
Limited
Legacy compatibility
Not with MRW
Host complexity
File system choice
Any
Shall have defect management