big sur time machine backup to readynas fails now - error 112

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Created Dec ’20

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have a macbook air 2020 that I have been backing up to a time machine hosted on a netgear readynas. been working fine for a while. now stopped. I think it stopped working around the time I upgraded to Big Sur.

I have deleted the entire time machine instance on the nas and created a new instance - same error. I can connect to the drive, enter username/password just fine. after it spins for a while, it comes back with an error - "the backup disk image - ***.macbookair.sparsebundle" could not be accessed error 112.
i have confirmed its using SMB as protocol on the nas.
tried everything ... thoughts?/suggestions?

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Answer 1

AlWafi999 OP

Dec ’20

I am facing the same issue with My Synology appliance, Did you find a solution ?

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Answer 2

HichemE OP

Jan ’21

Same here with a QNAP NAS. Same config as bubbadss. Checked on QNAP forum, no success.
Here's what I get:

The "***.sparsebundle" file is created in the share directory, which probably means Time Machine can access the smb shared directory.
Some files are loaded in the image file, with a fresh time stamp corresponding to the time of the backup.
After a few minutes, I get the dreaded "the backup image could not be accessed..."

...I wonder if it could be a timeout issue?

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