60976: Acronis Backup 12.5: backup to a managed vault fails with "input/output error"

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Applies to: 

Symptoms

You are backing up virtual machines to a managed location.

Backup fails with:

Error code: 32786
Module: 114
LineInfo: 0x28314C961DE7D6F6
Fields: {"$module":"disk_bundle_tape_off_glxa64_8850"}
Message: Failed to prepare for backup.
------------------------
Error code: 3
Module: 329
LineInfo: 0x1CD98AAE889424F9
Fields: {"$module":"disk_bundle_tape_off_glxa64_8850"}
Message: Backup has failed.
------------------------
Error code: 1060
Module: 1
LineInfo: 0xB43E776571144DF0
Fields: {"$module":"disk_bundle_tape_off_glxa64_8850"}
Message: Failed to commit operations.
------------------------
Error code: 52
Module: 7
LineInfo: 0x30BA355F9FD4FF2C
Fields: {"function":"archive_stream_write","code":"5005","$module":"disk_bundle_tape_off_glxa64_8850"}
Message: input/output error

Cause

Default timeout is too short for a large backup or a backup of multiple virtual machines.

Solution

If you are backing up multiple machines to tapes, update Acronis Backup to Update 2. Product performance for this scenario has been improved since this build.

If you are backing up to a low-performance device, increase the default timeout:

  1. On the machine with Acronis Storage Node installed, open Windows Registry: Start -> in search, type regedit.exe and press Enter.
  2. Navigate to HKLM\Software\Acronis\ASN\Configuration\StorageNode\DefaultIdleSessionTimeout
  3. Change the value of DefaultIdleSessionTimeout to 79200.
  4. Save changes.
  5. Restart Acronis Storage Node service.
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