Comparing Rotation Types - HP BB118BV - StorageWorks Data Protector Express Package User's Manual & Technical Reference

Deciding how frequently to overwrite media
Data Protector Express overwrites media in two ways: by overwriting the oldest media in a rotation type,
and by overwriting media on a fixed schedule based on the day of the week, month, or year. How long
you retain media depends on your business needs. If you need to retain media for longer than a few
days or weeks, consider using one of the fixed media rotation types. If you have a limited supply of
backup media and do not need to retain media for a long time, consider the other rotation types.

Comparing rotation types

Data Protector Express provides a variety of media rotation types to select from. Or, you can define
your own media rotation.
The following table compares the historical backups and full data recovery capabilities of each of the
rotation types provided in Data Protector Express.
NOTE:
This table assumes that no job uses more than one media set or group and presents the default rotation
type settings for the Run Repeatedly schedule type.
Table 8 Comparing rotation types
Media Rotation
type
GFS-62 rotation
(every 15
minutes)
GFS-54 rotation
(every hour)
GFS-30 rotation
Full Data Recovery
Available for Previous...
Previous 3 hours
Previous day
Previous 8 days
Previous 8 weeks
Previous 8 months
Previous 2 years
Previous day
Previous 12 days
Previous 8 weeks
Previous 8 months
Previous 2 years
Previous 12 days
Previous 8 weeks
Previous 8 months
Previous 2 years
Maximum Data Loss
15 minutes
1 hour
1 day
1 week
1 month
1 year
1 hour
1 day
1 week
1 month
1 year
1 day
1 week
1 month
1 year
User's Guide and Technical Reference
Historical backups
Available for Previous...
12 15-minute backups
24 hourly backups
8 daily backups
8 weekly backups
8 monthly backups
2 yearly backups
24 hourly backups
12 daily backups
8 weekly backups
8 monthly backups
2 yearly backups
12 daily backups
8 weekly backups
8 monthly backups
2 yearly backups
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