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Cloud Storage Gateway:Data in Cloud Storage Gateway does not sync to an OSS bucket

Last Updated:Apr 30, 2026

Uploads may fail when a file exceeds the size limit for your CSG version, or when the file is a sparse file.

Two known issues can prevent data from syncing to an OSS bucket. The following table summarizes the causes, affected versions, and recommended actions.

Cause

Affected versions

Recommended action

File exceeds the size limit (120 GB)

Earlier than 1.0.31

Upgrade to version 1.0.31 or later to raise the limit to 1.2 TB, or split the file into parts smaller than 120 GB before uploading.

File exceeds the size limit (1.2 TB)

1.0.31 and later

Split the file into parts smaller than 1.2 TB before uploading.

File is a sparse file

Earlier than 1.0.31

Upgrade to version 1.0.31 or later.

Details

  • In versions earlier than 1.0.31, an upload fails if the file is larger than 120 GB. In version 1.0.31 and later, an upload fails if the file is larger than 1.2 TB. These are hard limits for the respective versions. To upload a file that exceeds the limit, split it into smaller parts or upgrade to a version with a higher limit.

  • In versions earlier than 1.0.31, uploading a sparse file fails and retries repeatedly. A sparse file is a file that contains non-contiguous data blocks with empty regions between them. Upgrade to version 1.0.31 or later to resolve sparse file upload failures.