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Merge pull request #205302 from roygara/premLater
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articles/virtual-machines/disks-types.md

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@@ -3,7 +3,7 @@ title: Select a disk type for Azure IaaS VMs - managed disks
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description: Learn about the available Azure disk types for virtual machines, including ultra disks, Premium SSDs v2 (preview), Premium SSDs, standard SSDs, and Standard HDDs.
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author: roygara
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ms.author: rogarana
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ms.date: 07/18/2022
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ms.date: 08/01/2022
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ms.topic: conceptual
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ms.service: storage
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ms.subservice: disks
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#### Premium SSD v2 IOPS
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All Premium SSD v2 disks have a baseline IOPS of 3000. After 6 GiB, the maximum IOPS a disk can have increases at a rate of 500 per GiB, up to 80,000 IOPS. So an 8 GiB disk can have up to 4,000 IOPS, and a 10 GiB can have up to 5,000 IOPS. To be able to set 80,000 IOPS on a disk, that disk must have at least 160 GiB.
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All Premium SSD v2 disks have a baseline IOPS of 3000 that is free of charge. After 6 GiB, the maximum IOPS a disk can have increases at a rate of 500 per GiB, up to 80,000 IOPS. So an 8 GiB disk can have up to 4,000 IOPS, and a 10 GiB can have up to 5,000 IOPS. To be able to set 80,000 IOPS on a disk, that disk must have at least 160 GiB. Increasing your IOPS beyond 3000 increases the price of your disk.
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#### Premium SSD v2 throughput
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All Premium SSD v2 disks have a baseline throughput of 125 MB/s. After 6 GiB, the maximum throughput that can be set increases by 0.25 MB/s per set IOPS. If a disk has 3,000 IOPS, the max throughput it can set is 750 MB/s. To raise the throughput for this disk beyond 750 MB/s, its IOPS must be increased. For example, if you increased the IOPS to 4,000, then the max throughput that can be set is 1,000. 1,200 MB/s is the maximum throughput supported for disks that have 5,000 IOPS or more.
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All Premium SSD v2 disks have a baseline throughput of 125 MB/s, that is free of charge. After 6 GiB, the maximum throughput that can be set increases by 0.25 MB/s per set IOPS. If a disk has 3,000 IOPS, the max throughput it can set is 750 MB/s. To raise the throughput for this disk beyond 750 MB/s, its IOPS must be increased. For example, if you increased the IOPS to 4,000, then the max throughput that can be set is 1,000. 1,200 MB/s is the maximum throughput supported for disks that have 5,000 IOPS or more. Increasing your throughput beyond 125 increases the price of your disk.
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#### Premium SSD v2 Sector Sizes
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Premium SSD v2 supports a 4k physical sector size by default. A 512E sector size is also supported. While most applications are compatible with 4k sector sizes, some require 512-byte sector sizes. Oracle Database, for example, requires release 12.2 or later in order to support 4k native disks. For older versions of Oracle DB, 512-byte sector size is required.

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