The O&M training material defines the diagnostic information available through DeviceManager. It states that DHA runtime logs are disks' daily running logs, including disk-health statistics, I/O statistics, and service-life information. It also states that HSSD logs contain S.M.A.R.T. information and disk running logs. The same section states that DeviceManager provides Download Recent Log or All Logs for configuration, event, and debugging information, as well as Download DHA Runtime Log or HSSD Log for disk runtime, I/O, service-life, and S.M.A.R.T. information. In a multi-controller Huawei storage system, diagnostic information is distributed among controllers. The log-download operation therefore performs the collection stage before producing the controller-associated downloadable packages. This design ensures that the final log set reflects information from the relevant controllers rather than only the management controller.

The Training Materials explicitly document the available log categories and DeviceManager collection mechanisms; the controller-by-controller collection progress is part of the operational log-download workflow.

Study Guide Topics: Data Storage Management and O&M Collecting Storage System Information DeviceManager System Logs DHA Runtime Logs HSSD Logs.