MacBook Pro disk locked

Trying to reinstall mavericks from CMD R start up and get message "disk locked"
Problem has been trying to start and just getting grey screen with spinning wheel at bottom. Computer won't even reboot in recovery mode.
Any ideas?

Sounds as if your hard drive is damaged, unable to boot into even the Recovery partition.
Which model MacBook Pro do you have (e.g., "15-inch Late 2011")?
Clinton

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