# Updating a file system's SSD IOPS
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For file systems configured with SSD storage, the level of provisioned SSD IOPS determines the amount of disk I/O available when your file system has to read data from and write data to disk, as opposed to reading or writing data that is in cache. You can update SSD IOPS for a file system using the Amazon FSx console, the Amazon CLI, or the Amazon FSx API, as described in the following procedures. For more information about managing SSD IOPS, see [Managing SSD IOPS](managing-storage-configuration.md#managing-provisioned-ssd-iops).

## To update SSD IOPS for a file system (console)
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1. Open the Amazon FSx console at [https://console.amazonaws.cn/fsx/](https://console.amazonaws.cn/fsx/).

1. Navigate to **File systems** and choose the Windows file system that you want to update SSD IOPS for.

1. Under **Actions**, choose **Update SSD IOPS**. Or, in the **Summary** panel, select the **Update** button next to **Provisioned SSD IOPS**. The **Update IOPS provisioning** window opens.

1. For **Mode**, choose **Automatic** or **User-provisioned**. If you choose **Automatic**, Amazon FSx automatically provisions 3 SSD IOPS per GiB of storage capacity for your file system. If you choose **User-provisioned**, enter any whole number in the range of 96–400,000.

1. Choose **Update** to initiate the provisioned SSD IOPS update.

1. You can monitor the update progress on the **File systems** detail page, on the **Updates** tab.

## To update SSD IOPS for a file system (CLI)
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To update SSD IOPS for an FSx for Windows File Server file system, use the `--windows-configuration DiskIopsConfiguration` property. This property has two parameters, `Iops` and `Mode`:
+ If you want to specify the number of SSD IOPS, use `Iops={{number_of_IOPS}}`, up to a maximum of 400,000 in supported Amazon Regions and `Mode=USER_PROVISIONED`.
+ If you want Amazon FSx to increase your SSD IOPS automatically, use `Mode=AUTOMATIC` and don't use the `Iops` parameter. Amazon FSx automatically maintains 3 SSD IOPS per GiB of storage capacity on your file system, up to a maximum of 400,000 in supported Amazon Regions.

You can monitor the progress of the update by using the Amazon CLI command [describe-file-systems](https://docs.amazonaws.cn/cli/latest/reference/fsx/describe-file-systems.html). Look for the `administrative-actions` in the output. 

For more information, see [AdministrativeAction](https://docs.amazonaws.cn/fsx/latest/APIReference/API_AdministrativeAction.html).