You can use space efficiency techniques to reduce the amount of space for storing data. These techniques reduce the total storage space required to meet your needs. Introduction to vSAN Space EfficiencyYou can use space efficiency techniques to reduce the amount of space for storing data. These techniques reduce the total storage capacity required to meet your needs. Reclaiming Space with SCSI UnmapvSAN 6.7 Update 1 and later supports SCSI UNMAP commands that enable you to reclaim storage space that is mapped to a deleted vSAN object. Using Deduplication and CompressionvSAN can perform block-level deduplication and compression to save storage space. When you enable deduplication and compression on a vSAN all-flash cluster, redundant data within each disk group is reduced. Using RAID 5 or RAID 6 Erasure CodingYou can use RAID 5 or RAID 6 erasure coding to protect against data loss and increase storage efficiency. Erasure coding can provide the same level of data protection as mirroring (RAID 1), while using less storage capacity. RAID 5 or RAID 6 Design ConsiderationsConsider these guidelines when you configure RAID 5 or RAID 6 erasure coding in a vSAN cluster.