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In case you are interested, these are the settings that I use for Dell SC storage with the iSCSI software adapter:
Settings per host:
Conditions for round robin path changes, all datastores on host (section 6.9.1.1)
esxcli storage nmp satp rule add -s VMW_SATP_ALUA -V COMPELNT -P VMW_PSP_RR -o disable_action_OnRetryErrors -e "Dell EMC SC Series Claim Rule" -O "policy=iops;iops=3"
esxcli storage core claimrule load
Software iSCSI Queue Depth (section 4.2.2)
esxcli system module parameters set -m iscsi_vmk -p iscsivmk_LunQDepth=255
Software iSCSI login timeout (section 4.2.2)
esxcli iscsi adapter param set -A=vmhba## -k=LoginTimeout -v=5
Disable Delayed ACK (section 3)
esxcli iscsi adapter param set -A vmhba##-k DelayedAck -v false
Command from earlier versions of the document: vmkiscsi-tool -W -a delayed_ack=0 -j vmhba##
Settings per cluster:
HA Cluster Settings (section 4.3)
esxcli system settings kernel set -s terminateVMonPDL -v TRUE
HA Cluster Settings (section 4.3)
esxcli system settings advanced set -o "/Disk/AutoremoveOnPDL" -i 1
Advanced options HA Cluster setting (section 4.3)
das.maskCleanShutdownEnabled = True
Reference: https://downloads.dell.com/manuals/common/sc-series-vmware-vsphere-best-practices_en-us.pdf
André