List copy and content revisions separately
Fictional copies B1/B2/B3 all hold data revision V7. B4 holds V6. Requested recovery is V5. No log reconstruction or unlisted copy is available. Repeated current copies improve no historical depth in this supplied inventory.
| Copy | Content revision | RequestedV5 |
|---|---|---|
| B1/B2/B3 | V7 | No |
| B4 | V6 | No |
| Distinct retained set | V6,V7 | V5 absent |
Deduplicate retained revisions
- Read each copy content identity
- Form the unique revision set
- Check requested revision membership
Do not callV6 an exactV5 recovery merely because it is the oldest present.
How many copies, retained revisions and exactV5 candidates exist?
Show the worked answer
Four copies, two retained revisions, zero V5 candidates. V5 remains unsupported by the supplied materials.
Match the requested historical point
| Case | Decision | Reason |
|---|---|---|
| Four copies means four dates | Reject | Three hold sameV7 |
| ExactV5 request | Not supported | V5 absent |
If a different recovery point is acceptable, obtain that explicit decision and label its changed scope. Do not silently substitute the oldest copy.