CV0-002 · Question #91
When the cache receives write data from the hosts, which of the following does the controller send back to the host?
The correct answer is D. Acknowledgement. When a storage controller's cache receives write data from a host, it sends an acknowledgement to confirm receipt and ensure data integrity.
Question
When the cache receives write data from the hosts, which of the following does the controller send back to the host?
Options
- ARequest
- BHeader
- CFooter
- DAcknowledgement
How the community answered
(17 responses)- B6% (1)
- D94% (16)
Why each option
When a storage controller's cache receives write data from a host, it sends an acknowledgement to confirm receipt and ensure data integrity.
A request is typically sent by the host to the controller, not the other way around in response to write data.
A header contains metadata for a data packet, but it's not the primary response indicating data receipt.
A footer contains trailing information for a data packet, but it's not the primary response indicating data receipt.
An acknowledgement (ACK) is sent by the storage controller back to the host to confirm that the write data has been successfully received and stored in the cache. This confirmation is crucial for maintaining data consistency and host operation, as it signals that the host can proceed with other operations or release the data from its own buffers.
Concept tested: Storage controller write cache acknowledgement
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