71509: Acronis Cyber Protect 15: Operations with archives stored on SFTP fail with a CRC error

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Last update: 27-02-2023


  • You are backing up to an SFTP Storage
  • Backing up to or restoring from this storage fails with "Data is corrupted: CRC mismatch or internal data structures mismatch"


Backup archives get corrupted when SFTP protocol is used. The issue is going to be fixed in the future releases.


The issue has been fixed in P15U5, build 31227.

There are 2 reliable workarounds for earlier builds:

  1. use SMB instead of SFTP;
  2. always recreate an archive whenever you run a backup if SFTP is crucial for a security concept.