Ransomware attackers specifically target and attempt to destroy backup systems to increase the probability of payment. Hardening your system is critical. Please ensure you have reviewed your platform security using the Security Hardening Checklist
Fragmentation and checkpoint restart — NetBackup 9.1 | Cohesity Documentation
Fragmentation and checkpoint restart
If the policy's Checkpoint Restart feature is enabled, NetBackup creates a new fragment at each checkpoint. It creates the fragment according to the Take checkpoints every setting. For more information on Checkpoint Restart, refer to the NetBackup Administrator's Guide, Volume I.
