フリー問題

問題文

Each expansion shelf in a new system is cabled to the head unit over two separate SAS paths rather than one. What does the second path provide?

選択肢

1. With two paths the head unit keeps compressing the stream, so a single failure does not take the deduplicated capacity away.
2. With two paths the head unit keeps raising the alerts, so a single failure does not take the deduplicated capacity away.
3. With two paths the head unit keeps addressing the shelf, so a single failure does not take the deduplicated capacity away.
4. With two paths the head unit keeps holding the retention, so a single failure does not take the deduplicated capacity away.