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Copy file name to clipboardExpand all lines: articles/storage/common/storage-redundancy.md
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@@ -34,19 +34,21 @@ The following table provides a quick overview of the scope of durability and ava
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| An entire data center (zonal or non-zonal) becomes unavailable | No | Yes | Yes | Yes |
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| A region-wide outage | No | No | Yes | Yes |
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| Read access to your data (in a remote, geo-replicated region) in the event of region-wide unavailability | No | No | Yes (with RA-GRS) | Yes (with RA-GZRS) |
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| Designed to provide \_\_ durability of objects over a given year | at least 99.999999999% (11 9's) | at least 99.9999999999% (12 9's) | at least 99.99999999999999% (16 9's) | at least 99.99999999999999% (16 9's) |
| Availability SLA for read requests | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) for GRS<br /><br />At least 99.99% (99.9% for cool access tier) for RA-GRS | At least 99.9% (99% for cool access tier) for GZRS<br /><br />At least 99.99% (99.9% for cool access tier) for RA-GZRS |
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| Availability SLA for write requests | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) |
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| Designed to provide \_\_ durability of objects over a given year<sup>1</sup>| at least 99.999999999% (11 9's) | at least 99.9999999999% (12 9's) | at least 99.99999999999999% (16 9's) | at least 99.99999999999999% (16 9's) |
| Availability SLA for read requests<sup>1</sup> | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) for GRS<br /><br />At least 99.99% (99.9% for cool access tier) for RA-GRS | At least 99.9% (99% for cool access tier) for GZRS<br /><br />At least 99.99% (99.9% for cool access tier) for RA-GZRS |
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| Availability SLA for write requests<sup>1</sup> | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) | At least 99.9% (99% for cool access tier) |
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All data in your storage account is replicated, including block blobs and append blobs, page blobs, queues, tables, and files. All types of storage accounts are replicated, although ZRS requires a general-purpose v2 storage account.
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<sup>1</sup> For information about Azure Storage guarantees for durability and availability, see the [Azure Storage SLA](https://azure.microsoft.com/support/legal/sla/storage/).
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For pricing information for each redundancy option, see [Azure Storage Pricing](https://azure.microsoft.com/pricing/details/storage/).
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<sup>2</sup> For information for storage account types, see [Storage account overview](storage-account-overview.md).
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For information about Azure Storage guarantees for durability and availability, see the [Azure Storage SLA](https://azure.microsoft.com/support/legal/sla/storage/).
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All data for all types of storage accounts are replicated, including block blobs, append blobs, page blobs, queues, tables, and files.
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For pricing information for each redundancy option, see [Azure Storage Pricing](https://azure.microsoft.com/pricing/details/storage/).
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> [!NOTE]
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> Azure Premium Storage currently supports only locally redundant storage (LRS).
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> Azure Premium Disk Storage currently supports only locally redundant storage (LRS). Azure Premium Block Blob Storage supports locally redudant storage (LRS) and zone redudant storage (ZRS) in certain regions.
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## Changing replication strategy
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@@ -65,6 +67,7 @@ If you migrate your storage account from RA-GRS to GRS or LRS, that account is b
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