vsphere-esxi-vcenter-server-55-storage-guide

vSphere StoragePDL Conditions and High AvailabilityWhen a datastore enters a Permanent Device Loss (PDL) state, High Availability (HA) can power off virtualmachines and restart them later. VMware offers advanced options to regulate the power off and restartoperations for virtual machines. In the majority of environments, default settings do not need to be changed.However, depending on your specific environment you might need to modify some of these options.Table 15‐1. Advanced Parameters to Regulate PDLParameter Type of Parameter Descriptionscsi#:#.terminateVMOnPDLide#:#.terminateVMOnPDLsata#:#.terminateVMOnPDLdisk.terminateVMOnPDLDefaultVMkernel.Boot.terminateVMOnPDLdas.maskCleanShutdownEnabledAdvanced VirtualMachine Option.To configure, see “EditConfiguration FileParameters in thevSphere Web Client,” onpage 131.Advanced VirtualMachine Option.To configure, see “EditConfiguration FileParameters in thevSphere Web Client,” onpage 131.Advanced VMkernelOption.To configure, see “SetAdvanced HostAttributes in the vSphereWeb Client,” onpage 131HA Advanced Option.To configure, seehttp://kb.vmware.com/kb/2033250.Default value is FALSE.When TRUE, this parameter powers off thevirtual machine if the specified device thatbacks up the virtual machine's datastoreenters the PDL state. HA will not restartthis virtual machine. This setting overridesdisk.terminateVMOnPDLDefault.When set to DEFAULT,disk.terminateVMonPDLDefault is used.Default value is FALSE.When TRUE, this parameter powers off thevirtual machine if any device that backs upthe virtual machine's datastore enters thePDL state. HA will not restart this virtualmachine. This parameter can be overriddenon individual device basis by theappropriate{scsi,ide,sata}#:#.terminateVMOnPDL parameter.When set to DEFAULT,VMkernel.Boot.terminateVMOnPDL isused.Default value is FALSE.When set to TRUE, this parameter powersoff all virtual machines on the system whenstorage that they are using enters the PDLstate. Setting can be overridden for eachvirtual machine by the appropriate{scsi,ide,sata}#:#.terminateVMOnPDL or disk.terminateVMOnPDLDefaultparameter.Can be set only to TRUE or FALSE.NOTE After you make changes toVMkernel.Boot.terminateVMOnPDL,reboot the host.This option is set to TRUE by default. Itallows HA to restart virtual machines thatwere powered off while the PDL conditionwas in progress. When this option is set totrue, HA restarts all virtual machines,including those that were intentionallypowered off by a user.130 VMware, Inc.