Which of these factors indicates a high likelihood that the performance of a virtual machine is being constrained by disk I/O?

Which of these factors indicates a high likelihood that the performance of a virtual machine is being constrained by disk I/O? 






A. A long SCSI queue length
B. A large number of disk shares
C. A large number of kilobytes read and written
D. A large number of virtual disks on its SCSI bus








Answer: A


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