# Help with STATUS\_IO\_TIMEOUT Errors **URL:** \ **Category:** Support\ **Created:** [October 25, 2026, 11:35am UTC](https://forum.duplicati.com/t/help-with-status-io-timeout-errors/22839 "2026-10-25T11:35:13Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![AdmiralRaccoon](https://forum.duplicati.com/user_avatar/forum.duplicati.com/admiralraccoon/32/12951_2.png) [@AdmiralRaccoon](https://forum.duplicati.com/u/AdmiralRaccoon)\ **Post date:** [October 25, 2026, 11:35am UTC](https://forum.duplicati.com/t/help-with-status-io-timeout-errors/22839/1 "2026-10-25T11:35:13Z")
Hello Community, I´m desperatly struggling with Duplicati when trying to do Backups to an older DIY NAS I built. The Backup sometimes fails after 5 Minutes, sometimes after 1 hour with the following Error Messages in the Job: > ```plaintext > "Warnings": [ > "2026-10-25 12:06:43 +01 - [Warning-Duplicati.Library.Main.Backend.Handler-BackendManagerHandlerFailure]: Error in handler: Datei Schreiben mittels PutAsync fehlgeschlagen duplicati-b0f7569a6b5b64e1b9d2a86f8cad53812.dblock.zip.aes with status STATUS_IO_TIMEOUT\nUserInformationException: Datei Schreiben mittels PutAsync fehlgeschlagen duplicati-b0f7569a6b5b64e1b9d2a86f8cad53812.dblock.zip.aes with status STATUS_IO_TIMEOUT", > "2026-10-25 12:06:44 +01 - [Warning-Duplicati.Library.Main.Backend.Handler-BackendManagerDisposeWhileActive]: Terminating 1 active uploads", > "2026-10-25 12:06:44 +01 - [Warning-Duplicati.Library.Main.Backend.Handler-BackendManagerDisposeError]: Error in active upload: Cancelled", > "2026-10-25 12:06:44 +01 - [Warning-Duplicati.Library.Main.Backend.BackendManager-BackendManagerShutdown]: Backend manager queue runner crashed\nAggregateException: One or more errors occurred. (Datei Schreiben mittels PutAsync fehlgeschlagen duplicati-b0f7569a6b5b64e1b9d2a86f8cad53812.dblock.zip.aes with status STATUS_IO_TIMEOUT)" > ], > "Errors": [ > "2026-10-25 12:06:44 +01 - [Error-Duplicati.Library.Main.Operation.BackupHandler-FatalError]: Fatal error\nUserInformationException: Datei Schreiben mittels PutAsync fehlgeschlagen duplicati-b0f7569a6b5b64e1b9d2a86f8cad53812.dblock.zip.aes with status STATUS_IO_TIMEOUT", > "2026-10-25 12:06:44 +01 - [Error-Duplicati.Library.Main.Controller-FailedOperation]: Die Operation Backup ist fehlgeschlagen\nUserInformationException: Datei Schreiben mittels PutAsync fehlgeschlagen duplicati-b0f7569a6b5b64e1b9d2a86f8cad53812.dblock.zip.aes with status STATUS_IO_TIMEOUT" > > ``` The Job backups MP3 files from an SMB share to the target SMB share. I already reduced the “asynchronous-upload-limit” to 2, and the “read-write-timeout” to 5 minutes, but the error still happens. Could it be that the NAS Hardware is simply to slow to handle the backups? ```plaintext HP Microsserver N54L (AMD Turion(tm) II Neo N54L Dual-Core Processor) 8 GB DDR3 Intel Pro 1000 Dual NIC (1 used with 1gbit) Open Media Vault (Current Version) 2x 2TB as RAID1 2x 8TB as RAID1 RAIDs were built with OMV, so It´s a software RAID ``` If there are any more details for debugging, I´ll be happy to provide them. Thank you and a nice sunday, Philipp