Hello ,
Max , I understand you are experiencing performance issues and you are referring to queue depth and IOPS on disks.
While the scrub is ongoing it is normal to see high IOPS on the drives.
It is not advised to disable scrub as it is important to check the disks for defects
It will fix parity mismatches for RAID 5 and 6 and mirror mismatches for RAID 1 and 10.
Queue depth shows the "average" number of pending IOPS to be processed.
However , we would require more data to check the performance issues.
Details that are required :
> Host OS
> Is it direct attach or are the hosts connected via switch
> From when are we seeing these high numbers on the stats. When exactly did the issue start
> Apart from the numbers and stats you see on the MSA , are you experiencing latency on the hosts ?
> Collect MSA logs and execute the below commands
show controller-statistics both
show host-port-statistics
show vdisk-statistics
show volume-statistics
show disk-statistics
Save the Putty session
Run these commands for 5 Instances. That is , run these set of commands first time. Wait for 5 minutes. Again run these for the second time.
Total of 5 instances with a gap of 5 minutes after each instance.
Please log a case with HPE support with all the above details
I am an HPE employee
Any personal opinions expressed are mine, and not official statements on behalf of Hewlett Packard Enterprise
