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articles/azure-netapp-files/manage-cool-access.md

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## Considerations
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There are several considerations to be aware of when enabling cool access and for the impact of cool access on other features in Azure NetApp Files.
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There are several considerations to be aware of when using cool access.
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### General considerations for cool access
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* No guarantee is provided for any maximum latency for client workload for any of the service tiers.
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* Although cool access is available for the Standard, Premium, and Ultra service levels, how you're billed for using the feature differs from the hot tier service-level charges. For details and examples, see the [Billing section](cool-access-introduction.md#billing).
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* You can convert an existing capacity pool into a cool-access capacity pool to create cool access volumes. After the capacity pool is enabled for cool access, you can't convert it back to a non-cool-access capacity pool.
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* When you enable cool access, data that satisfies the conditions set by the coolness period moves to the cool tier. For example, if the coolness period is set to 30 days, any data that has been cool for at least 30 days moves to the cool tier _when_ you enable cool access.
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* Volumes enabled for cool access can be moved between capacity pools only if those capacity pools are enabled for cool access. Once a volume has been enabled for cool access, it can only reside in a cool access-enabled capacity pool even if cool access has been disabled on the volume.
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* A cool-access capacity pool can contain both volumes with cool access enabled and volumes with cool access disabled.
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* To prevent data retrieval from the cool tier to the hot tier during sequential read operations (for example, antivirus or other file scanning operations), set the cool access retrieval policy to **Default** or **Never**. For more information, see [Enable cool access on a new volume](#enable-cool-access-on-a-new-volume).
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* After the capacity pool is configured with the option to support cool access volumes, the setting can't be disabled at the _capacity pool_ level. You can turn on or turn off the cool access setting at the _volume_ level anytime. Turning off the cool access setting at the volume level stops further tiering of data. 
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### Considerations for moving volumes to another capacity pool
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* Volumes enabled for cool access can be moved between capacity pools only if those capacity pools are enabled for cool access. Once a volume has been enabled for cool access, it can only reside in a cool access-enabled capacity pool even if cool access has been disabled on the volume.
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* If you [move a cool access volume to another capacity pool (service level change)](dynamic-change-volume-service-level.md), you must also enable that pool for cool access.
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* If you disable cool access and turn off tiering on a cool access volume (that is, the volume no longer uses cool access), you can't move it to a non-cool-access capacity pool. In a cool access capacity pool, you can move all volumes, *whether they're enabled for cool access or not*, only to another cool access capacity pool.
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### Considerations for cross-region and cross-zone replication
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* With [cross-region](cross-region-replication-introduction.md) and [cross-zone](cross-zone-replication-introduction.md) replication, the cool access setting on the destination volume is updated automatically to match the source volume. This update occurs whenever the setting is changed on the source volume or during authorization. The setting is also updated automatically when a reverse resync of the replication is performed, but only if the destination volume is in a cool access-enabled capacity pool. Changes to the cool access setting on the destination volume don't affect the setting on the source volume.

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