Creating this ticket to:
- Use [[ https://grafana.wikimedia.org/goto/6T7viykHR?orgId=1 | the Prometheus metrics recorded around the time of the last `stat1011` hang ]] to estimate the upper bounds of I/O performance on `stat1011` in its current configuration
- Get hardware information on
-- `stat1011`'s host bus adapter ( the Dell HBA355i Front, product info [[ https://www.dell.com/support/manuals/en-ph/hba-355/hba355_ug/dell-hba355i-adapter-dell-hba355i-front-dell-hba355e-adapter-dell-hba350i-mx-dell-hba350i-adapter-~?guid=guid-deebf2dc-68be-425c-bd30-ac3346ededc6&lang=en-us | here ]] )
-- `stat1011`'s disk . This information will help us compare theoretical maximums to what we saw during the last outage.
- Research cgroups v2 support for I/O and [[ https://gitlab.wikimedia.org/repos/search-platform/sre/ansible-cgroup | test implementations ]]