The timeline information of the host-side disk I/O usage data is displayed at the Disk Usage layer in the msprof_*.json file. The summary information is summarized in the host_disk_usage_*.csv file.

Applicable Products

Product	Supported
Atlas A3 training products/Atlas A3 inference products	√
Atlas A2 training products/Atlas A2 inference products	√
Atlas 200I/500 A2 inference products	√
Atlas inference products	√
Atlas training products	√
Ascend 950PR/Ascend 950DT	√

Data at the Disk Usage Layer in msprof_*.json

The following figure shows data at the Disk Usage level in the msprof_*.json file.

Figure 1 Disk usage layer

**Table 1** Field description
Field	Description
Disk Usage	Disk usage.

host_disk_usage_*.csv File

The file content is formatted as follows.

Figure 2 host_disk_usage_*.csv

**Table 2** Field description
Field	Description
Device_id	Device ID. host is displayed for data on the host.
Peak Disk Read(KB/s)	Peak disk read rate (KB/s).
Recommend Disk Read(KB/s)	Recommended disk read rate in virtualization scenarios (KB/s).
Peak Disk Write(KB/s)	Peak disk write rate (KB/s).
Recommend Disk Write(KB/s)	Recommended disk write rate in virtualization scenarios (KB/s).

host_disk_usage (Host-Side Disk I/O Usage)

Applicable Products

Data at the Disk Usage Layer in msprof_*.json

host_disk_usage_*.csv File