6.5.1

You can specify the following suboptions with the -C option.
n
-S|--setfsname - Define the volume label of the VMFS datastore you are creating. Use this
suboption only with the -C option. The label you specify can be up to 128 characters long and cannot
contain any leading or trailing blank spaces.
Note vCenter Server supports the 80 character limit for all its entities. If a datastore name exceeds
this limit, the name gets shortened when you add this datastore to vCenter Server.
After you define a volume label, you can use it whenever you specify the VMFS datastore for the
vmkfstools command. The volume label appears in listings generated for the ls -l command and
as a symbolic link to the VMFS volume under the /vmfs/volumes directory.
To change the VMFS volume label, use the ln -sf command. Use the following as an example:
ln -sf /vmfs/volumes/UUID /vmfs/volumes/datastore
datastore is the new volume label to use for the UUID VMFS.
Note If your host is registered with vCenter Server, any changes you make to the VMFS volume
label get overwritten by vCenter Server. This operation guarantees that the VMFS label is consistent
across all vCenter Server hosts.
n
-Y|--unmapGranularity #[bBsSkKmMgGtT] - This suboption applies to VMFS6 only. Define
granularity for the unmap operation. The default granularity is 1 MB. As with the block size, enter the
unit type.
n
-O|--unmapPriority <none|low|medium|high> - This suboption applies to VMFS6 only. Define
the priority for the unmap operation.
Example: Example for Creating a VMFS File System
This example illustrates creating a VMFS6 datastore named my_vmfs on the naa.ID:1 partition.
~ vmkfstools -C vmfs6 -S my_vmfs /vmfs/devices/disks/naa.ID:1
Adding an Extent to a VMFS Datastore
Use the vmkfstools command to add an extent to a VMFS datastore.
When you add an extent, you span the VMFS datastore from the head partition across the partition
specified by span_partition.
-Z|--spanfs span_partition head_partition
vSphere Storage
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