The password command decrypts the storage configuration file (config) using the old password, and re-encrypts the file using a new password.
It does not change all the encryption keys used to encrypt and decrypt chunk files, snapshot files, etc.
Quick overview
Usage
The password command requires no arguments, changing a password is an interactive process.
Options
-storage <storage name>
You can specify the storage to change the password for when working with multiple storages.
-iterations <i>
The -iterations option specifies how many iterations are used to generate the key that encrypts the config file from the storage password.