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[[!meta title="Checking the file system of the Persistent Storage"]]
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In rare occasions, you might have to perform a file system check to repair a broken Persistent Storage.
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Unlock the Persistent Storage
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When starting Tails, keep the Persistent Storage locked and [[set up an administration password|doc/first_steps/welcome_screen/administration_password]].
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1. Choose <span class="menuchoice"> <span class="guimenu">Applications</span> ▸ <span class="guisubmenu">Utilities</span> ▸ <span class="guimenuitem">Disks</span> </span> to open <span class="application">GNOME Disks</span>.
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In the left pane, click on the device corresponding to your Tails USB stick.
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In the right pane, click on the partition labeled as <span class="guilabel">TailsData LUKS</span>.
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Click on [[!img lib/network-wireless-encrypted.png alt="Unlock" class="symbolic" link="no"]]</span> to unlock the Persistent Storage. Enter the passphrase of the Persistent Storage and click **Unlock** again.
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Klicken Sie auf die Schaltfläche <span class="guimenu">[[!img lib/unlock.png alt="Entsperren" class="symbolic" link="no"]]</span>, um den beständigen Speicherbereich freizuschalten. Geben Sie die Passphrase des beständigen Speicherbereichs ein und klicken Sie auf <span class="guilabel">Entsperren</span>.
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In the confirmation dialog, enter your administration password and click <span class="guilabel">Authenticate</span>.
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Click on the <span class="guilabel">TailsData Ext4</span> partition that appears below the <span class="guilabel">TailsData LUKS</span> partition.
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Identify the device name of your Persistent Storage. The device name appears below the list of volumes. It should look like <code>/dev/mapper/luks-xxxxxxxx</code>.
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Triple-click to select it and press **Ctrl+C** to copy it to the clipboard.
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Check the file system using the terminal
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1. Choose <span class="menuchoice"> <span class="guimenu">Applications</span> ▸ <span class="guisubmenu">System Tools</span> ▸ <span class="guimenuitem">Root Terminal</span></span> and enter your administration password to open a root terminal.
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In the terminal, execute the following command, replacing `[device]` with the device name found in step 8:
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fsck -y [device]
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To do so, you can type <span class="command">fsck -y </span> and press <span class="keycap">Shift+Ctrl+V</span> to paste the device name from the clipboard.
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If the file system is free of errors, the last line from the output of <span class="command">fsck</span> starts with <span class="command">TailsData: clean</span>.
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If the file system has errors, <span class="command">fsck</span> tries to fix them automatically. After it finishes, you can try executing the same command again to check if all errors are solved.
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