Multiple choice technology performance

Which one amongst the following counters are referred to identify Disk related performance issues

  1. Disk sec / Transfer

  2. Network Interface\ Bytes Total/sec

  3. Server\ Bytes Received/sec

  4. Packets Received Errors

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A Correct answer
Explanation

'Disk sec / Transfer' measures the average time in seconds for a disk transfer operation, which directly indicates disk performance bottlenecks. The other metrics monitor network interface traffic or packet errors, which are network-related rather than disk-related.