NS0-509: NetApp Certified Implementation Engineer–SAN Specialist, Practice ExamDemo

By Netapp · Question Mode

QuestionQ25

ONTAP SAN implementation testing and troubleshooting

A thin-provisioned LUN was created with the following command:

lun create -vserver vs1 -path /vol/vol1/lun1 -size 500G -ostype windows_2008 -space-reserve disabled -space-allocation disabled

Your Windows 2016 host reports 200 GB free on lun1. However, lun1 reports 0 bytes free on the storage cluster.

What should you do to resolve this problem?

  • A Change the LUN -space-allocation parameter to enabled.
  • B Change the LUN -ostype parameter to windows_gpt.
  • C Change the LUN -space-reserve parameter to enabled.
  • D Rescan the LUN disk in your Windows host so that it will notify NetApp about the free space.
Explanation

ONTAP requires LUN space allocation to be enabled for T10 SCSI thin provisioning, including UNMAP-based reclamation of blocks the Windows host has freed. With space allocation disabled, host filesystem free space is not returned to the thin-provisioned LUN’s backing storage, so ONTAP can show no free capacity despite free space reported by Windows.

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