github.com/vmware/govmomi@v0.51.0/vapi/library/testdata/README.md (about)

     1  Please note, the only purpose of the `.ovf`, `.vmdk` and `.iso` files in this directory is to instrument the content library simulator. The files themselves are not valid. They are the product of running the following command to produce `1MiB` files:
     2  
     3  ```shell
     4  dd if=/dev/zero of=ttylinux-pc_i486-16.1-disk1.vmdk bs=1024 count=0 seek=1024
     5  dd if=/dev/zero of=ttylinux-pc_i486-16.1.iso bs=1024 count=0 seek=1024
     6  ```
     7  
     8  The `.mf` manifest was created with:
     9  
    10  ```shell
    11  sha1sum --tag *.ovf *.vmdk >ttylinux-pc_i486-16.1.mf
    12  ```
    13  
    14  The `.ova` file was constructed with:
    15  
    16  ```shell
    17  tar cf ttylinux-pc_i486-16.1.ova *.ovf *.mf *.vmdk
    18  ```