Failed to write block. Error code "665"

[Ardelan]

Good morning,

I am useing starwind VTL on a server 2019.

I have a VM with server 2012R2 with DPM, everything works fine except 1 (large, around 6 tb) backup to tape does not work.

After a couple of TB i get this error in DPM 30101 Data error Cyclic redudancy check 0x80070017.

At the same time the following error occurs in VTL:

UID 2068 CODE 4355 Description VTL Device VTL2: TAPE 'xxx" Failed to write block. Error code '665'

Now i am trying the following regfix on the DPM: HKLM\SOFTWARE\Microsoft\Microsoft Data Protection Manager\Agent BufferQueueSize 5 and the backup is running.

In the meanwhile i am open to other suggestions, if the bufferQueueSize regfix fails.

Kind regards

[yaroslav (staff)]

Greetings,

Could we kindly have the logs, please? Use log collector to collect them https://knowledgebase.starwindsoftware. ... collector/. Share them with SharePoint or any other convenient tool.

[Ardelan]

I have send the link to logs in a PM

[yaroslav (staff)]

Greetings,

Please consider updating VTL and VSAN to the latest build and reconnecting the tapes over iSCSI. Also make sure to split the tape in parts so that each part is 1 TB. If updating does not help, please send me the logs again and log a call with us at support@starwind.com