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    Cloud Storage Gateway:Manage a cache

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    Cloud Storage Gateway:Manage a cache

    Last Updated:May 07, 2026

    This topic explains how to add and expand a cache in the Cloud Storage Gateway console.

    Prerequisites

    A file gateway must be created. For more information, see Manage File Gateways.

    Background information

    Each share in a file gateway corresponds to a unique cache disk. If you create multiple shares, you must create an equal number of cache disks. A cache disk uploads data from a share to OSS and synchronizes data from OSS to local storage.

    Attach a cache disk

    1. On the Gateways page, click the ID of the gateway. On the page that appears, click Cache > Create Cache.

    2. Specify cache disk specifications by using Cache Calculator or Custom Cache settings.

      Note

      • Capacity

        • The capacity of a cache disk for a Basic gateway ranges from 40 GB to 4,096 GB.

        • The capacity of a cache disk for a Standard gateway ranges from 40 GB to 8,192 GB.

        • The capacity of a cache disk for an Enhanced or Performance Optimized gateway ranges from 40 GB to 32,768 GB.

      • Type

        Select Ultra Disk, Standard SSD, or ESSD based on your business requirements.

      If you attach a cache disk to a Subscription gateway, you are redirected to the cache disk purchase page. For more information, see Purchase a cache disk.

    Expand a cache

    You can expand a cache disk.

    1. On the Gateways page, click the target file gateway and then click the Cache tab.

    2. On the Cache page, find the target cache disk, click the + icon, and set the new cache capacity.

      Note

      • The new capacity must be within the following ranges:

        • Basic gateway: greater than the current capacity and less than or equal to 4,096 GB.

        • Standard gateway: greater than the current capacity and less than or equal to 8,192 GB.

        • Enhanced and Performance Optimized gateways: greater than the current capacity and less than or equal to 32,768 GB.

    If you use a Subscription file gateway, after clicking OK, you are redirected to the cache disk purchase page. On the purchase page, change the cache disk size to the desired capacity and complete the payment. The expansion begins automatically after payment is complete.

    For example, to expand a 100 GB ESSD PL1 cache disk to 200 GB, simply change the ESSD (PL1) cache size to 200 GB on the purchase page.

    Next steps

    Create a share