Reboot SAN Controllers
To reboot Dell SAN Controllers use the following option:
Summary tab / Actions / System / Shutdown-Restart and select Restart in Sequence.
This will restart one controller then restart the next after the first has come back online.
SAN Configuration Best Practice
Guide for configuring Dell SAN: https://downloads.dell.com/manuals/common/sc-series-vmware-vsphere-best-practices_en-us.pdf
Volume Increase on SAN
After increasing a volume on a SAN refresh the scsi channels on all esxi hosts after the SAN increase. If this is not done then some hosts may not see the correct size of the volume on the SAN and will cause any changes in disks to error. This is required on DELL MEs and/or COMPELENT SANs