Backup system state

Hello,

We want to backup 'All_local_drives', but the backup always gets blocked at 'Shadow_copy_components', ( status code 50)

Instead, we have tested to backup the client by using like backup selections in the policy:  ' system state, drive C:\ and drive D:\, it worked well,

My question is  : the components "system state, drive C:\ and drive D:\" are sufficient to restore the client via BMR ?

Tanks for your reply