A Logical Disk object type is a partition on a hard or fixed disk drive and assigned a drive letter, such as C. Disks can be partitioned into distinct sections where they can store file, program, and page data. The disk is read to retrieve these items, and written to record changes to them.
Disk Read Time is the percentage of elapsed time that the selected disk drive is busy servicing read requests.
Index: 202 Default Scale: 1
Counter Type: PERF_COUNTER_TIMER Counter Size: 8 bytes
Disk Time is the percentage of elapsed time that the selected disk drive is busy servicing read or write requests.
Index: 200 Default Scale: 1
Counter Type: PERF_COUNTER_TIMER Counter Size: 8 bytes
Disk Write Time is the percentage of elapsed time that the selected disk drive is busy servicing write requests.
Index: 204 Default Scale: 1
Counter Type: PERF_COUNTER_TIMER Counter Size: 8 bytes
Percent Free Space is the ratio of the free space available on the logical disk unit to the total usable space provided by the selected logical disk drive.
Index: 408 Default Scale: 1
Counter Type: PERF_RAW_FRACTION Counter Size: 4 bytes
Avg. Disk Bytes/Read is the average number of bytes transferred from the disk during read operations.
Index: 226 Default Scale: 0.01
Counter Type: PERF_AVERAGE_BULK Counter Size: 4 bytes
Avg. Disk Bytes/Transfer is the average number of bytes transferred to or from the disk during write or read operations.
Index: 224 Default Scale: 0.01
Counter Type: PERF_AVERAGE_BULK Counter Size: 4 bytes
Avg. Disk Bytes/Write is the average number of bytes transferred to the disk during write operations.
Index: 228 Default Scale: 0.01
Counter Type: PERF_AVERAGE_BULK Counter Size: 4 bytes
Avg. Disk sec/Read is the average time in seconds of a read of data from the disk.
Index: 208 Default Scale: 1000
Counter Type: PERF_AVERAGE_TIMER Counter Size: 8 bytes
Avg. Disk sec/Transfer is the time in seconds of the average disk transfer.
Index: 206 Default Scale: 1000
Counter Type: PERF_AVERAGE_TIMER Counter Size: 4 bytes
Avg. Disk sec/Write is the average time in seconds of a write of data to the disk.
Index: 210 Default Scale: 1000
Counter Type: PERF_AVERAGE_TIMER Counter Size: 4 bytes
Disk Bytes/sec is the rate bytes are transferred to or from the disk during write or read operations.
Index: 218 Default Scale: 0.0001
Counter Type: PERF_COUNTER_BULK_COUNT Counter Size: 8 bytes
Disk Queue Length is the number of requests outstanding on the disk at the time the performance data is collected. It includes requests in service at the time of the snapshot. This is an instantaneous length, not an average over the time interval. Multi-spindle disk devices can have multiple requests active at one time, but other concurrent requests are awaiting service. This counter may reflect a transitory high or low queue length, but if there is a sustained load on the disk drive, it is likely that this will be consistently high. Requests are experiencing delays proportional to the length of this queue minus the number of spindles on the disks. This difference should average less than 2 for good performance.
Index: 198 Default Scale: 10
Counter Type: PERF_COUNTER_RAWCOUNT Counter Size: 4 bytes
Disk Read Bytes/sec is the rate bytes are transferred from the disk during read operations.
Index: 220 Default Scale: 0.0001
Counter Type: PERF_COUNTER_BULK_COUNT Counter Size: 8 bytes
Disk Reads/sec is the rate of read operations on the disk.
Index: 214 Default Scale: 1
Counter Type: PERF_COUNTER_COUNTER Counter Size: 4 bytes
Disk Transfers/sec is the rate of read and write operations on the disk.
Index: 212 Default Scale: 1
Counter Type: PERF_COUNTER_COUNTER Counter Size: 4 bytes
Disk Writes/sec is the rate of write operations on the disk.
Index: 216 Default Scale: 1
Counter Type: PERF_COUNTER_COUNTER Counter Size: 4 bytes
Disk Write Bytes is rate bytes are transferred to the disk during write operations.
Index: 222 Default Scale: 0.0001
Counter Type: PERF_COUNTER_BULK_COUNT Counter Size: 8 bytes
Free Megabytes displays the unallocated space on the disk drive in megabytes. One megabyte = 1,048,576 bytes.
Index: 410 Default Scale: 1
Counter Type: PERF_COUNTER_RAWCOUNT Counter Size: 4 bytes