Disks can be used to spool data prior to being permanently stored on tape for long term/offsite storage. Defining managed disk space thresholds allows you to retain your disk data longer by pruning data according to disk capacity and existing retention criteria. You can define two-disk capacity thresholds for managed disk space:
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A threshold (in percentage) for starting the data aging operation (upper limit)
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A threshold (in percentage) for stopping the data aging (lower limit)
When disk capacity reaches a high threshold (for example, 85%), any data exceeding its retention criteria is qualified for aging. When disk capacity reaches the low threshold (for example, 70%), the aging process automatically stops. Once the managed disk is set up the process runs automatically without user intervention to manage disk capacity. Data protection operations are retained on disk longer than usual providing the benefits of disk storage without having to spend manual efforts to manage the disk capacity.
Note
Managed disk space for disk library prunes the data once the threshold capacity is reached. If the data needs to be preserved for longer period of time, then use Extended Retention Rules settings on the Storage Policy Copy. See Extended Retention Rules for more information.
Enabling Managed Disk Space for Disk Data
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From the CommCell Browser, expand to Policies | Storage Policies.
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Right-click the appropriate storage policy copy, and then click Properties.
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Click the Retention tab.
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Select the Enable Managed Disk Space for Disk Library check box.
If a non-deduplicated storage policy is created with valid retention criteria other than infinite retention, then this option is automatically enabled in the copies.
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Click OK.
Configuring Predefined Thresholds for Disk Capacity
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From the CommCell Browser, expand to Storage Resources | Libraries.
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Right-click the appropriate library, and then click Properties.
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Click the Space Management tab.
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Set the start and stop data aging disk capacity thresholds in the Start aging when data occupied on disk is n % and the Stop aging when data occupied on disk is n % boxes.
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Click OK.
Setting the Frequency for Checking the Disk Space and Deleting Data
Data Aging determines the pruning based on jobs. Jobs with older data (based on the creation time of its first archive file) are pruned first. Once the Data Aging operation determines the jobs to be pruned, data is deleted based on the established threshold. See Data Aging for more information.
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On the ribbon in the CommCell Console, click the Storage tab, and then click Media Management.
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If necessary, click the Service Configuration tab.
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For Interval (Minutes) between disk space updates,enter how often disk space is checked.
By default, the value is set to 30 minutes.
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Click OK.