With Linux and ZFS, QuTS hero supports advanced data reduction technologies for further driving down costs and increasing reliablility of SSD (all-flash) storage. QuTS hero is the operating system for high-end and enterprise QNAP NAS models. This will prevent long-running backups from. So yes, per-vm, ( or hyper-v settings defaults), you can set your temporary snapshot location in hyper-v/vm settings. After the backup proxy finishes reading VM data, Veeam Backup & Replication requests Microsoft Hyper-V VSS to perform cleanup operations. The hypervisors settings will determine where this temporary snapshot lives. To keep Hyper-V backups manageable, Veeam Backup & Replication uses Changed Block Tracking (CBT) to retrieve only those data blocks that have changed since the previous job session. WIth Linux and ext4, QTS enables reliable storage for everyone with versatile value-added features and apps, such as snapshots, Plex media servers, and easy access of your personal cloud. Veeam only uses snapshots to help it back up the data that exists at the ponit in time of the snapshot. QTS is the operating system for entry- and mid-level QNAP NAS.