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Atempo's Time Navigator 4.0, Enterprise Edition


Good

• Modular design; you pay only for what you need
• Outstanding multiplatform support
• Extremely scalable


Bad


• Full-file incremental backups require more storage space than block- or byte-level backups

Time Navigator 4.0 Enterprise Edition, starts at $6,350 for one Time Navigator Windows Server, 10 agents, one tape drive and the Exchange Server module. Atempo, (866) 417-0200, (650) 494-2600. www.atempo.com

The Time Navigator server provides the nexus for data management and stores a catalog of attached system agent configurations, object indexes and storage device listings. The administrative console, which could be configured to run from a remote desktop and monitored over the Web, gave me complete, centralized control over all attached devices and agents. From the server, I installed on my second system a storage node, which included the Time Navigator agent, support for the Sony AIT-4 tape drive and a required 110 MB of disk space. I then configured the tape drive from the admin console and built a cartridge pool to manage tape identification and specify utilization policies for the on-deck tapes. Atempo uses a similar model for all storage devices, so it was easy to designate disk space on the server for use as disk-to-disk storage, a strategy that translates well across multiple types of devices in hierarchical storage environments.

Next, I created a backup "strategy" that involved designating my storage media of choice and establishing timing for full and incremental backups. Atempo uses file-level sampling for incremental backups; though this eats up more storage space for backup data, it requires less processing overhead than block- or byte-level sampling. I designated a simple full/incremental backup, with the server writing to the Sony AIT-4 drive on the storage node and the storage node writing to the disk volume created on the server.

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