restore-only-osdisk dont work

[danielcgonzalez]

az feedback auto-generates most of the information requested below, as of CLI version 2.40

Related command
az backup restore restore-disks --resource-group dgg --vault-name backupvault --container-name azvmwdzsapp01 --item-name azvmwdzsapp01 --storage-account storagedggbackup --rp-name 53373614092896 --target-resource-group az-ne-zs-d-mgt-01-rg --restore-only-osdisk

Describe the bug
restore all vm disk, expected only os disk

To Reproduce
after doing a manual full backup, tried to restore only os disk

Expected behavior
restore only os disk

Environment summary
last CLI version 2.40
tried in azure devops agent in ubuntu and in local WSL ubuntu 22

updated in comments

[yonzhan]

route to CXP team

[bertvaneyken]

Hi Team, this bug is really critical.
Being unable to restore an OS-disk only on bigger machines makes a huge difference on machines with multiple disks +2TB.
In my case the restore time objective caused by this bug goes from a 128GB disk to 10TB!
The machine has a windows update problem going back past the timing of the snapshots, so no quick restore available anymore.

[danielcgonzalez]

update:
checked again, same problem.
after some investigation, command line argument display this:

--restore-only-osdisk : Use this flag to restore only OS disks of a backed up VM.
Allowed values: false, true.

tested again with --restore-only-osdisk true and works as expected.

anyways, in microsoft.com documentation and examples, don't show the "true" flag, and about this, i don't know if there is any case when we should need this flag as false. i think that if this flag is writted, it should be true as default or return an error waiting for true or false.

[cdiskan]

This issue is still unresolved in the documentation.