Edit Volumes Dialog (vCD)
Used only in environments with vCD.
To edit storage information for one of the virtual machines volumes, in the STORAGE tab select the volume/s and click EDIT SELECTED.
1. Volume Source: The source on the recovery site for the replicated data.
■ vCD managed storage policy: Zerto will select a datastore, from the list of available datastores, in the selected Storage Policy in which to place the Volume, unless the datastore is excluded in the Configure Provider vDCs Dialog.
■ If there are several valid datastores, the datastore with the most available space is selected.
■ Zerto recalculates the datastore available space for each volume sequentially, taking into consideration previously allocated volumes.
■ Preseeded volume: A virtual disk (the VMDK flat file and descriptor) in the recovery site that has been prepared with a copy of the protected data. Zerto recommends using this option particularly for large disks so that the initial synchronization is much faster since a Delta Sync is used to synchronize any changes written to the recovery site after the creation of the preseeded disk. When not using a preseeded disk the initial synchronization phase has to copy the whole disk over the WAN. Browse to the preseed folder configured for the customer and the disk name, of the preseeded disk. In order to use a preseeded VMDK, do the following:
■ Create a folder in vCD to use for the preseeded disks in the datastore you want to use for the customer.
■ Specify this datastore as a provider datastore for preseeded disks in the Configure Provider vDCs dialog, from the Advanced Settings dialog, as described in Zerto Cloud Manager Administration Guide.
■ In the Zerto Cloud Manager specify the Preseed Folder Name for the ZORG, in the Manage ZORG tab.
Zerto Virtual Replication searches for the preseeded folder in the available datastores in the Org vDCs specified in the vCD Cloud Resources for the ZORG in the Zerto Cloud Manager and takes ownership of the preseeded disk, moving it from its source folder to the folder used by the VRA. Note that if the virtual machine has more than one preseeded disk, these disks must reside on the same datastore. If the preseeded disk is greater than 1TB on NFS storage, the VPG creation might fail. This is a known VMware problem when the NFS client does not wait for sufficient time for the NFS storage array to initialize the virtual disk after the RPC parameter of the NFS client times out. The timeout default value is 10 seconds. Refer to the VMware documentation, http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1027919, which describes the configuration option to tune the RPC timeout parameter using the esxcfg-advcfg -s <Timeout> /NFS/SetAttrRPCTimeout command.
If the VPG is being defined for a Zerto Organization, ZORG, the location of the preseeded disk must be defined in the Zerto Cloud Manager. For details, refer to Zerto Cloud Manager Administration Guide.
Zerto Virtual Replication supports the SCSI protocol. Only disks that support this protocol can be specified. Virtual machine RDMs in a vCenter Server are replicated as VMDKs in a vCD environment.
2. When selecting Storage Policy, consider the following:
■ Zerto will select a datastore from the selected Storage Policy in which to place these files, unless the datastore is excluded in the Configure Provider vDCs Dialog.
■ Zerto will try to determine a default Storage Policy according to:
■ A Storage Policy with the same name as the protected Storage Policy.
■ The default Orgvdc Storage Policy.
If Zerto did not manage to determine a default Storage Policy, this field appears empty.
■ When you click to edit, a list of Storage Policies appear. These Storage Policies:
■ Were defined in VMware vCloud Director and are configured in the Orgvdc.
■ Have at least one Datastore that was not excluded as a Recovery Volume in the Configure Provider vDCs Dialog.
3. Temp Data Disk: If the virtual machine to be replicated includes a temp data disk as part of its configuration, specify a mirror disk for replication that is marked as a temp data disk. In this case, data is not replicated to the temp data disk after initial synchronization.
Zerto Virtual Replication supports the SCSI protocol. Only disks that support this protocol can be specified.
4. You can specify whether the recovery volume is thin-provisioned or not, unless the Org vDC only supports thin-provisioned volumes.
