Merge pull request #215162 from roygara/durability

Durability updates

Author: prmerger-automator[bot]

articles/virtual-machines/disks-redundancy.md

@@ -3,7 +3,7 @@ title: Redundancy options for Azure managed disks
 description: Learn about zone-redundant storage and locally-redundant storage for Azure managed disks.
 author: roygara
 ms.author: rogarana
-ms.date: 02/03/2022
+ms.date: 10/19/2022
 ms.topic: how-to
 ms.service: storage
 ms.subservice: disks
@@ -18,7 +18,7 @@ Azure managed disks offer two storage redundancy options, zone-redundant storage
 
 ## Locally-redundant storage for managed disks
 
-Locally-redundant storage (LRS) replicates your data three times within a single data center in the selected region. LRS protects your data against server rack and drive failures. To protect an LRS disk from a zonal failure like a natural disaster or other issues, take the following steps:
+Locally-redundant storage (LRS) replicates your data three times within a single data center in the selected region. LRS protects your data against server rack and drive failures. LRS disks provide at least 99.999999999% (11 9's) of durability over a given year. To protect an LRS disk from a zonal failure like a natural disaster or other issues, take the following steps:
 
 - Use applications that can synchronously write data to two zones, and automatically failover to another zone during a disaster.
     - An example would be SQL Server Always On.
@@ -29,7 +29,7 @@ If your workflow doesn't support application-level synchronous writes across zon
 
 ## Zone-redundant storage for managed disks
 
-Zone-redundant storage (ZRS) synchronously replicates your Azure managed disk across three Azure availability zones in the region you select. Each availability zone is a separate physical location with independent power, cooling, and networking.
+Zone-redundant storage (ZRS) synchronously replicates your Azure managed disk across three Azure availability zones in the region you select. Each availability zone is a separate physical location with independent power, cooling, and networking. ZRS disks provide at least 99.9999999999% (12 9's) of durability over a given year.
 
 A ZRS disk lets you recover from failures in availability zones. If a zone went down, a ZRS disk can be attached to a virtual machine (VM) in a different zone. ZRS disks can also be shared between VMs for improved availability with clustered or distributed applications like SQL FCI, SAP ASCS/SCS, or GFS2. A shared ZRS disk can be attached to primary and secondary VMs in different zones to take advantage of both ZRS and [availability zones](../availability-zones/az-overview.md). If your primary zone fails, you can quickly fail over to the secondary VM using [SCSI persistent reservation](disks-shared-enable.md#supported-scsi-pr-commands).
 

articles/virtual-machines/managed-disks-overview.md

@@ -4,7 +4,7 @@ description: Overview of Azure managed disks, which handle the storage accounts
 author: roygara
 ms.service: storage
 ms.topic: conceptual
-ms.date: 04/22/2022
+ms.date: 10/19/2022
 ms.author: rogarana
 ms.subservice: disks
 ms.custom: contperf-fy21q1
@@ -23,7 +23,7 @@ Let's go over some of the benefits you gain by using managed disks.
 
 ### Highly durable and available
 
-Managed disks are designed for 99.999% availability. Managed disks achieve this by providing you with three replicas of your data, allowing for high durability. If one or even two replicas experience issues, the remaining replicas help ensure persistence of your data and high tolerance against failures. This architecture has helped Azure consistently deliver enterprise-grade durability for infrastructure as a service (IaaS) disks, with an industry-leading ZERO% annualized failure rate.
+Managed disks are designed for 99.999% availability. Managed disks achieve this by providing you with three replicas of your data, allowing for high durability. If one or even two replicas experience issues, the remaining replicas help ensure persistence of your data and high tolerance against failures. This architecture has helped Azure consistently deliver enterprise-grade durability for infrastructure as a service (IaaS) disks, with an industry-leading ZERO% annualized failure rate. Locally-redundant storage (LRS) disks provide at least 99.999999999% (11 9's) of durability over a given year and zone-redundant storage (ZRS) disks provide at least 99.9999999999% (12 9's) of durability over a given year.
 
 ### Simple and scalable VM deployment