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E-Series Metrics

This document describes which E-Series metrics are collected and what those metrics are named in Harvest, including:

  • Details about which Harvest metrics each dashboard uses. These can be generated on demand by running bin/harvest grafana metrics. See #1577 for details.
Creation Date : 2026-Feb-13
E-Series Version: 11.80.0
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Understanding the structure

Below is an annotated example of how to interpret the structure of each of the metrics.

eseries_volume_read_ops Name of the metric exported by Harvest

Volume read I/O operations per second. Description of the E-Series metric

  • API will be REST since E-Series uses the REST API
  • Endpoint name of the REST API endpoint used to collect this metric
  • Metric name of the E-Series counter
  • Template path of the template that collects the metric
API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics readOps conf/eseriesperf/11.80.0/volume.yaml

Metrics

eseries_array_cache_hit_ops

Total number of IO operations that hit cache on the array

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics cacheHitsIopsTotal conf/eseriesperf/11.80.0/array.yaml

The eseries_array_cache_hit_ops metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Highlights timeseries Top $TopResources Arrays by Cache Hit IOPS

eseries_array_drive_count

Total number of drives in the storage array

API Endpoint Metric Template
REST storage-systems driveCount conf/eseries/11.80.0/array.yaml

eseries_array_free_pool_space

Free space available in storage pools in bytes

API Endpoint Metric Template
REST storage-systems freePoolSpace conf/eseries/11.80.0/array.yaml

The eseries_array_free_pool_space metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Capacity timeseries Top $TopResources Systems by Storage Capacity Used %
E-Series: Array Capacity timeseries Top $TopResources Systems by Free Space

eseries_array_host_spares_used

Number of hot spare drives currently in use

API Endpoint Metric Template
REST storage-systems hostSparesUsed conf/eseries/11.80.0/array.yaml

eseries_array_labels

This metric provides information about E-Series storage arrays.

API Endpoint Metric Template
REST storage-systems Harvest generated conf/eseries/11.80.0/array.yaml

The eseries_array_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Capacity table Array Configuration

eseries_array_read_data

Array-wide read data throughput in bytes per second

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics readBytesTotal conf/eseriesperf/11.80.0/array.yaml

The eseries_array_read_data metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Highlights timeseries Top $TopResources Arrays by Read Throughput

eseries_array_read_ops

Array-wide read I/O operations per second

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics readIopsTotal conf/eseriesperf/11.80.0/array.yaml

The eseries_array_read_ops metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Highlights timeseries Top $TopResources Arrays by Read IOPS

eseries_array_tray_count

Number of drive trays in the storage array

API Endpoint Metric Template
REST storage-systems trayCount conf/eseries/11.80.0/array.yaml

eseries_array_unconfigured_space

Unconfigured space available in the storage array in bytes

API Endpoint Metric Template
REST storage-systems unconfiguredSpace conf/eseries/11.80.0/array.yaml

The eseries_array_unconfigured_space metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Capacity timeseries Top $TopResources Systems by Unconfigured Space

eseries_array_used_pool_space

Used space in storage pools in bytes

API Endpoint Metric Template
REST storage-systems usedPoolSpace conf/eseries/11.80.0/array.yaml

The eseries_array_used_pool_space metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Capacity timeseries Top $TopResources Systems by Storage Capacity Used %
E-Series: Array Capacity timeseries Top $TopResources Systems by Used Space

eseries_array_write_data

Array-wide write data throughput in bytes per second

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics writeBytesTotal conf/eseriesperf/11.80.0/array.yaml

The eseries_array_write_data metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Highlights timeseries Top $TopResources Arrays by Write Throughput

eseries_array_write_ops

Array-wide write I/O operations per second

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics writeIopsTotal conf/eseriesperf/11.80.0/array.yaml

The eseries_array_write_ops metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Highlights timeseries Top $TopResources Arrays by Write IOPS

eseries_battery_labels

This metric provides information about batteries.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml

The eseries_battery_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Battery table Battery

eseries_cache_backup_device_capacity

Capacity of the cache backup device in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory cacheBackupDevices.capacityInMegabytes conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_cache_backup_device_capacity metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Cache table Cache Backup Devices

eseries_cache_backup_device_labels

This metric provides information about cache backup devices.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_cache_backup_device_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Cache table Cache Backup Devices

eseries_cache_memory_dimm_capacity

Capacity of the cache memory DIMM in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory cacheMemoryDimms.capacityInMegabytes conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_cache_memory_dimm_capacity metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Cache table Cache Memory DIMMs

eseries_cache_memory_dimm_labels

This metric provides information about cache memory DIMMs.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_cache_memory_dimm_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Cache table Cache Memory DIMMs

eseries_controller_cache_hit_ops

Total number of IO operations that hit cache on the controller

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics cacheHitsIopsTotal conf/eseriesperf/11.80.0/controller.yaml

The eseries_controller_cache_hit_ops metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Highlights timeseries Top $TopResources Controllers by Cache Hit Ops

eseries_controller_code_version_labels

This metric provides information about controller code versions.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_controller_code_version_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Highlights table Code Versions

eseries_controller_cpu_utilization

Controller CPU utilization percentage

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics cpuUtilizationStats.0.sumCpuUtilization conf/eseriesperf/11.80.0/controller.yaml

The eseries_controller_cpu_utilization metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Highlights timeseries Top $TopResources Controllers by CPU Utilization

eseries_controller_drive_interface_labels

This metric provides information about controller drive-side interfaces.

API Endpoint Metric Template
REST storage-systems/{array_id}/interfaces?channelType=driveside Harvest generated conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_controller_drive_interface_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Drive Interfaces table Drive Interfaces

eseries_controller_host_interface_labels

This metric provides information about controller host-side interfaces.

API Endpoint Metric Template
REST storage-systems/{array_id}/interfaces?channelType=hostside Harvest generated conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_controller_host_interface_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Host Interfaces table Host Interfaces

eseries_controller_labels

This metric provides information about controllers.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml

The eseries_controller_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Controller Details table Controller Configuration
E-Series: Hardware Highlights table Controller Configuration

eseries_controller_net_interface_labels

This metric provides information about controller network interfaces.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_controller_net_interface_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Management table Management Ports
E-Series: Hardware Management table DNS & NTP Configuration

eseries_controller_processor_memory

Controller processor memory size in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory controllers.processorMemorySizeMiB conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_controller_processor_memory metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Controller Details table Controller Cache & Memory
E-Series: Hardware Cache table Controller Cache & Memory
E-Series: Hardware Cache timeseries Top $TopResources Controllers by Processor Cache

eseries_controller_read_data

Total number of bytes read by the controller

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics readBytesTotal conf/eseriesperf/11.80.0/controller.yaml

The eseries_controller_read_data metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Highlights timeseries Top $TopResources Controllers by Read Throughput

eseries_controller_read_ops

Total number of read IO operations serviced by the controller

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics readIopsTotal conf/eseriesperf/11.80.0/controller.yaml

The eseries_controller_read_ops metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Highlights timeseries Top $TopResources Controllers by Read IOPS

eseries_controller_total_cache_memory

Total cache memory on the controller in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory controllers.cacheMemorySize conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_controller_total_cache_memory metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Controller Details table Controller Cache & Memory
E-Series: Hardware Cache table Controller Cache & Memory
E-Series: Hardware Cache timeseries Top $TopResources Controllers by Data Cache Total

eseries_controller_used_cache_memory

Used cache memory on the controller in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory controllers conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_controller_used_cache_memory metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Controller Details table Controller Cache & Memory
E-Series: Hardware Cache table Controller Cache & Memory
E-Series: Hardware Cache timeseries Top $TopResources Controllers by Data Cache Used

eseries_controller_write_data

Total number of bytes written by the controller

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics writeBytesTotal conf/eseriesperf/11.80.0/controller.yaml

The eseries_controller_write_data metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Highlights timeseries Top $TopResources Controllers by Write Throughput

eseries_controller_write_ops

Total number of write IO operations serviced by the controller

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics writeIopsTotal conf/eseriesperf/11.80.0/controller.yaml

The eseries_controller_write_ops metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Controller Highlights timeseries Top $TopResources Controllers by Write IOPS

eseries_drive_block_size

Logical block size of the drive in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory drives.blkSize conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_drive_block_size metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Drives table Drives

eseries_drive_block_size_physical

Physical block size of the drive in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory drives.blkSizePhysical conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_drive_block_size_physical metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Drives table Drives

eseries_drive_capacity

Raw capacity of the drive in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory drives.rawCapacity conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_drive_capacity metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Drives table Drives

eseries_drive_labels

This metric provides information about drives.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_drive_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Drives table Drives

eseries_drive_percent_endurance_used

Percentage of SSD endurance used for solid state drives

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory drives.ssdWearLife.percentEnduranceUsed conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_drive_percent_endurance_used metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Drives table Drives

eseries_fan_labels

This metric provides information about fans.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml

The eseries_fan_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Fan table Fan

eseries_host_labels

This metric provides information about hosts connected to the storage array.

API Endpoint Metric Template
REST storage-systems/{array_id}/hosts Harvest generated conf/eseries/11.80.0/host.yaml

The eseries_host_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Array Host table Host Configuration

eseries_power_supply_labels

This metric provides information about power supplies.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml

The eseries_power_supply_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Power Supply table Power Supply

eseries_sfp_labels

This metric provides information about SFP transceivers.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_sfp_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware SFP table SFP

eseries_thermal_sensor_labels

This metric provides information about thermal sensors.

API Endpoint Metric Template
REST storage-systems/{array_id}/hardware-inventory Harvest generated conf/eseries/11.80.0/hardware.yaml (Hardware plugin)

The eseries_thermal_sensor_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Hardware Thermal Sensor table Thermal Sensor

eseries_volume_allocated_capacity

Allocated capacity of the volume in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/volumes totalSizeInBytes conf/eseries/11.80.0/volume.yaml

The eseries_volume_allocated_capacity metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Volume Table table Volumes

eseries_volume_block_size

Block size of the volume in bytes

API Endpoint Metric Template
REST storage-systems/{array_id}/volumes blkSize conf/eseries/11.80.0/volume.yaml

The eseries_volume_block_size metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Volume Table table Volumes

eseries_volume_labels

This metric provides information about volumes.

API Endpoint Metric Template
REST storage-systems/{array_id}/volumes Harvest generated conf/eseries/11.80.0/volume.yaml

The eseries_volume_labels metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Volume Table table Volumes

eseries_volume_read_cache_hit_ratio

Volume read cache hit ratio calculated from read hit operations and total read operations

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics Harvest Generated conf/eseriesperf/11.80.0/volume.yaml (CacheHitRatio plugin)

The eseries_volume_read_cache_hit_ratio metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Cache timeseries Top $TopResources Volumes by Read Cache Hit Ratio

eseries_volume_read_data

Volume read data throughput in bytes per second

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics readBytes conf/eseriesperf/11.80.0/volume.yaml

The eseries_volume_read_data metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Highlights timeseries Top $TopResources Volumes by Read Throughput

eseries_volume_read_hit_ops

Number of read operations that hit cache

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics readHitOps conf/eseriesperf/11.80.0/volume.yaml

eseries_volume_read_latency

Read response time average in microseconds

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics readTimeTotal conf/eseriesperf/11.80.0/volume.yaml

The eseries_volume_read_latency metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Highlights timeseries Top $TopResources Volumes by Read Latency

eseries_volume_read_ops

Volume read I/O operations per second

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics readOps conf/eseriesperf/11.80.0/volume.yaml

The eseries_volume_read_ops metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Highlights timeseries Top $TopResources Volumes by Read IOPs

eseries_volume_reported_capacity

The capacity in bytes of the volume

API Endpoint Metric Template
REST storage-systems/{array_id}/volumes capacity conf/eseries/11.80.0/volume.yaml

The eseries_volume_reported_capacity metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Volume Table table Volumes

eseries_volume_total_cache_hit_ratio

Volume total cache hit ratio combining read and write cache hit operations

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics Harvest Generated conf/eseriesperf/11.80.0/volume.yaml (CacheHitRatio plugin)

The eseries_volume_total_cache_hit_ratio metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Cache timeseries Top $TopResources Volumes by Total Cache Hit Ratio

eseries_volume_write_cache_hit_ratio

Volume write cache hit ratio calculated from write hit operations and total write operations

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics Harvest Generated conf/eseriesperf/11.80.0/volume.yaml (CacheHitRatio plugin)

The eseries_volume_write_cache_hit_ratio metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Cache timeseries Top $TopResources Volumes by Write Cache Hit Ratio

eseries_volume_write_data

Volume write data throughput in bytes per second

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics writeBytes conf/eseriesperf/11.80.0/volume.yaml

The eseries_volume_write_data metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Highlights timeseries Top $TopResources Volumes by Write Throughput

eseries_volume_write_hit_ops

Volume write cache hit operations per second

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics writeHitOps conf/eseriesperf/11.80.0/volume.yaml

eseries_volume_write_latency

Write response time average in microseconds

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics writeTimeTotal conf/eseriesperf/11.80.0/volume.yaml

The eseries_volume_write_latency metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Highlights timeseries Top $TopResources Volumes by Write Latency

eseries_volume_write_ops

Volume write I/O operations per second

API Endpoint Metric Template
REST storage-systems/{array_id}/live-statistics writeOps conf/eseriesperf/11.80.0/volume.yaml

The eseries_volume_write_ops metric is visualized in the following Grafana dashboards:

Dashboard Row Type Panel
E-Series: Volume Highlights timeseries Top $TopResources Volumes by Write IOPs