Hello @slciec ,

Post running esxtop command please use the "u" to switch to latency of Disks and then refresh every 2 Sec and see if the DAVG value is going high.

If the DAVG value goes high on any disk with the u parameter then the issue is from the disk and if that disk is local then use the iLO/iDRAC/KVM to perform the extensive diagnostic check on the disks.