Every company now highly emphasize on data security, for example, company establish information management department to better manage company internal data security.
To protect data, one of key factors you need to consider is data backup. Backup can be divided into three levels:
Hardware-level backup: hardware-level backup refers to using hardware redundancy to protect system’s continuous operations, for example, disk mirror and Dual Fault-Tolerant. If the main hardware gets damaged, backup hardware can immediately take over the work, this approach can effectively prevent hardware failure.
But this solution also has flaws; it can’t prevent data logical corruption. When logical corruption occurs, hardware backup will copy the error again, it can’t really protect data. The goal of hardware backup is actually to ensure system continue running when failure occurs, which is more likely hardware fault tolerance.
Software-level backup: software-level backup refers to saving system data in other software, so that when error occurs you can restore system to backup status. Since this backup solution should be fulfilled with software, it’s called software-level backup.
But this solution takes much time on backup and restore. This solution can prevent logical corruption, because backup media is separate from computer system, error won’t be rewrote in backup media, which means it will help restore data as long as it can save enough history data. But this is not suitable to companies that need to quickly restore data.
Manual backup: Manual backup is the most initial but also the most simple and effective method.
But if you use manual mode to restore data, it will spend more time than using software-level backup.
When choosing backup solution, you need to consider the importance level of the data first. For more important data, choose multiple solutions to back up. In addition, use data protection software to encrypt important data.