How should servers be backed up, and how often should backups be verified?

Backups split into system and data. For systems, use the RAID controller snapshot or cloud snapshots; for data, rsync or backup software on regular servers, and RMAN full plus incremental for Oracle. Frequency: monthly full system, daily incremental data. Verification matters: run a restore drill monthly. ZhongLianDa maintenance customers get backup configuration guidance and scheduled restore verification to keep the DR plan truly effective.