There is a command group 'az_vm_disk'. This group of commands could 'manage the managed data disks attached to a vm'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_vm_disk_attach'.The syntax is: az vm disk attach --vm-name
                  [--caching {none, readonly, readwrite}]
                  [--disks]
                  [--enable-write-accelerator]
                  [--lun]
                  [--name]
                  [--new]
                  [--resource-group]
                  [--size-gb]
                  [--sku {premium_lrs, standardssd_lrs, standard_lrs, ultrassd_lrs}]
                  [--subscription]. The 1th example of the child command would be to use it to 'attach a new default sized  1023 gb  managed data disk to a vm', the syntax is: az vm disk attach -g MyResourceGroup --vm-name MyVm --name disk_name --new. The 2th example of the child command would be to use it to 'attach a managed persistent disk to a vm   autogenerated', the syntax is: az vm disk attach --name $diskId --new --resource-group MyResourceGroup --size-gb 128 --sku Standard_LRS --vm-name MyVm. The 3th example of the child command would be to use it to 'attach multiple managed disks to a vm', the syntax is: az vm disk attach --vm-name MyVm --resource-group MyResourceGroup --sku Standard_LRS --disks diskId1 diskId2 diskId3. The parameter '--vm-name' is required. It is used to the name of the virtual machine. you can configure the default using `az configure --defaults vm=<name>`.. The parameter '--caching' is optional. disk caching policy.. The parameter '--disks' is optional. one or more names or ids of the managed disk (space-delimited).. The parameter '--enable-write-accelerator' is optional. enable write accelerator.. The parameter '--lun' is optional. 0-based logical unit number (lun). max value depends on the virtual machine size.. The parameter '--name -n' is optional. the name or id of the managed disk.. The parameter '--new' is optional. create a new disk.. The parameter '--resource-group -g' is optional. name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. The parameter '--size-gb -z' is optional. size in gb. max size: 4095 gb (certain preview disks can be larger).. The parameter '--sku' is optional. underlying storage sku.. The parameter '--subscription' is optional. name or id of subscription. you can configure the default subscription using `az account set -s name_or_id`.. 