When "mklabel" subcommand of "parted" command is executed, is the information after the 16th block from the top of a disk rewritten by this command?

Issue

• When "mklabel" subcommand of "parted" command is executed, is the information after the 16th block from the top of a disk rewritten by this command?

• Following warning message is output from parted command:

$ parted /dev/sdi
GNU Parted 2.1
Using /dev/sdi
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt
Warning: The existing disk label on /dev/sdi will be destroyed and all data on 
this disk will be lost. Do you want to continue?
Yes/No?

• However, by renewal of the label information, will all data of the disk be really destroyed?