Tuesday, March 23, 2021

0x80070780: The file cannot be accessed by the system

Today got this error when trying to import a virtual machine on my newly rebuilt Hyper-V VM host running Windows Server 2019:

0x80070780: The file cannot be accessed by the system

I tried playing with permissions but it kept erroring out saying that it couldn't access the vhdx files. Finally, I realized that when I rebuilt the VM host, I forgot to install the data deduplication feature and thus the system could see the file names, but not access the deduplicated data.

After I enabled the data deduplication role service and rebooted, the system recognized the drives had deduplicated data and could access the files without issue.

2 comments:

  1. You absolute beauty. This just saved me while trying to recover a couple of VMs from a failed S2D cluster

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  2. You have saved me from losing 25TB of data after months of heartache and searching re 0x80070780. I could see it but couldn't use it. A simple OS upgrade caused so much grief. Date dedupe - so simple, and worked first time. Thank you so much!

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