NS0-163: NetApp Certified Data Administrator, ONTAPDemo

By Netapp · Question Mode

QuestionQ17

ONTAP Storage and Data Protection

An administrator has presented a thinly provisioned iSCSI LUN to an ESXi host. The administrator deleted data from the datastore in ESXi, but no blocks were freed on the LUN.

Which two steps should the administrator take to resolve this issue?

Choose two
  • A Use the vmfs unmap command
  • B Rescan the storage from the host
  • C Set the volume to thin-provisioned
  • D Set the space-allocation to enabled\
Explanation

VMFS must send an UNMAP request to notify the thin-provisioned storage array that deleted datastore blocks can be deallocated. The device’s space-allocation capability must also be enabled so ESXi can issue and the array can process that reclamation operation. A storage rescan only rediscovers storage configuration; it does not release deleted VMFS blocks.

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