QSAN snapshot (QSnap) is based on copy-on-write technology. It’s a block-based and differential backup mechanism. QSnap’s functionality is designed to be highly efficient; it keeps a point in time record of block-level, incremental data changes of the target volume. QSnap can help recover a volume to a previous state quickly to meet enterprise SLA (Service Level Agreement) requirements of RPO (Recovery Point Objectives) and RTO (Recovery Time Objective).
QSnap is the easiest and most effective measurement to protect against ransomware attacks, virus attacks, accidental file deletion, accidental file modification, or unstable system hardware caused by bad I/O cable connection, unstable power supply, etc.