Dell PowerVault DL2200 - Manual (Page 4)

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• Once‐a‐day backups—only capture a single point of recovery
• Increasingly complex management (incrementals, differentials, multivendor solutions, and so on)
• Questionable reliability
Recovery
The point of protecting data is ensuring that it is recoverable when needed. With tape backups, however, recovery
can be a time‐consuming, bottlenecked process that makes it difficult to get the right file to the right person at the
right time. Key drawbacks to tape recovery include:
• Recovery can be lengthy and cumbersome.
• Only trained administrators can recover data.
Backup Process
1. A full backup of each file server is performed at a scheduled time once a week.
2. Incremental backups of each file server are performed daily, during off‐peak hours.
Recovery Process
1. Users submit a file restore request to administrators.
2. Administrators locate the tape(s); mount it, designate the file from the point of the last backup, and
restore to the user.
Disk‐Based Backups
Key benefits
Disk‐based backups provide several key benefits that are not realized with tape. First, backups are typically faster
and more efficient, while recovery time improves significantly. Additionally, disk traditionally provides a more
reliable format for data protection. Benefits include:
• Faster, more efficient backups
• More reliable backups
• Faster and easier recovery
• Possibility to back up to tape for long‐term archival and offsite storage
Key drawbacks
While disk‐based backups significantly improve data protection and recovery, they still have some drawbacks:
• Potential impact on production servers (still require a backup window)
• Data backed up to disk, possibly using tape emulation (sequentially, but not continuously)
• Data backed up in backup format—IT administration still needed for restores
Recovery