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https://blog.it-kb.ru/2016/10/25/ovirt-virtual-machines-backup-storage-export-domain-deduplication-with-quadstor-storage-virtualization-on-centos-linux-7-2-over-mdadm-software-raid/
Дедупликация хранилища резервных копий виртуальных машин oVirt с помощью QUADStor Storage Virtualization на CentOS Linux 7.2