Virtual Disk Rate (KBps) The Virtual Disk Rate chart displays virtual disk usage rate for the virtual machine. After you click Overview on the Performance tab of the virtual machine, you can view this chart by selecting Home from the View drop-down menu. It is available only at collection levels 3 and 4. Table 101. Data Counters Chart Label Description Read Requests Number of virtual disk read commands completed on each virtual disk on the virtual machine. The aggregate number of all virtual disk read commands per second is also displayed in the chart. Read rate = blocksRead per second × blockSize ■ Counter: read ■ Stats Type: Rate ■ Unit: KiloBytes per second (KBps) ■ Rollup Type: Average ■ Collection Level: 3 Write Requests Number of virtual disk write commands completed on each virtual disk on the virtual machine per second. The aggregate number of all virtual disk write commands is also displayed in the chart. Write rate = blocksWritten per second × blockSize ■ Counter: write ■ Stats Type: Rate ■ Unit: KiloBytes per second (KBps) ■ Rollup Type: Average ■ Collection Level: 3