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The Unofficial Backup Admin's Handbook Part 4

Storage Mediums

So let's now cover the various different storage mediums out there and some of their attributes:

Disk (non-deduplicated) - SAN or Local disks
Hard disk storage (either spinning or SSD) available to a backup server as storage space. Images are stored in their original size from the backup client.

Best used for short term storage (such as staging) with minimum CPU and memory overhead

Costly for longer term storage

Very fast backup and restore (as data can be stored in a nonlinear format)

Can be replicated offsite for Disaster Recovery/Business Continuity purposes

Higher risk of data loss due to server tampering or virus/malware corruption (varies by platform)

Disk (deduplicated) - SAN or Local disks
Hard disk storage (either spinning or SSD) available to a backup server as storage space. Images are broke up into blocks, "fingerprinted" to verify unique data, and only unique data is stored. All duplicate data is reduced to a single copy and references to that …