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Druva Documentation

The size of the Data downloaded from inSync backup to a Mac OS is larger in size than the size displayed in the inSync admin UI.

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Problem description

Admin tries to download a snapshot from the Admin UI onto a MAC device. The size of the data displayed in the UI is extremely lesser than the size of the data downloaded. 

Cause

The operating system of iPhone, iPad, iPod touch, and Mac reports storage capacity using the decimal system (base 10), which calculates 1KB = 1000 Bytes

Whereas, the data stored on inSync storage is calculated as 1KB = 1024 Bytes.

Summary

  • This is not a defect.

  • Druva Cloud Storage uses the industry standards for calculating storage in terms of 1024 Bytes = 1 KB.

  • Thus, if you see a snapshot of size 1 GB for example; in the Admin UI, then that means its size in Bytes is 1,073,741,824 Bytes, on the cloud storage.

  • When this data is downloaded on MAC, it gets calculated in terms of 1000 Bytes = 1KB. Thus, 1,073,741,824 / 1,000,000,000 = 1.07 GB on MAC.

 

This is an expected behavior.

Here’s a reference document from Apple, that explains How iOS and macOS report storage capacity.

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