Get-VM | Measure-VM | select VMName,
    @{Label='TotalIO';Expression = {$_.AggregatedDiskDataRead + $_.AggregatedDiskDataWritten}},
    @{Label='%Read';Expression={"{0:P2}" -f ($_.AggregatedDiskDataRead/($_.AggregatedDiskDataRead + $_.AggregatedDiskDataWritten))}},
    @{Label='%Write';Expression={"{0:P2}" -f ($_.AggregatedDiskDataWritten/($_.AggregatedDiskDataRead + $_.AggregatedDiskDataWritten))}},
    @{Label='TotalIOPS';Expression = {"{0:N2}" -f (($_.AggregatedDiskDataRead + $_.AggregatedDiskDataWritten)/$_.MeteringDuration.Seconds)}}