One of three WORM policies can be applied to shares where they protect existing data or files subsequently added. The Xmirror option replicates volumes or shared folders with other Qsan appliances placed in synchronization zones. The same app runs remote backups to other Qsan appliances or Rsync-compatible devices while cloud backup supports Alibaba Cloud OSS, Amazon S3 and HiCloud. Snapshots can be rolled back for instant recovery while NAS ones can be browsed for specific folders and files. Snapshots are managed from the Backup app where we could select NAS shares and iSCSI LUNs, create schedules and replicate snapshots to remote Qsan appliances.
For general caching, SSDs can be added to a pool at any time and designated as read or write caches. To use data tiering, you must assign SSDs to your storage pool during creation. A new feature is support for ZFS RAID-Z3, which offers triple-drive redundant storage pools for even greater protection. Qsan's discovery portal found the appliance on our network and we allowed its wizard to load the latest QSM 3.1 software and create a RAID5 array using four 8TB Seagate NAS drives.
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