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Thread: Adding LUKS-encrypted drive

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    Junior Member Ofnuts's Avatar
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    Jun 2016
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    May 29th 2020
    Local Time
    04:49 AM

    Adding LUKS-encrypted drive

    I'm trying to add a second disk (HDD, first drive is SSD) on a freshly installed Kubuntu 19.10 (where the boot disk is already LUKS encrypted).
    I open the Partition Manager and

    • select the sda drive (the HDD),
    • add a GPT partition table,
    • add a primary partition with
      • ext4 file system
      • LUKS encryption option checked

    At some point I'm asked for a passphrase and a mount point, so everything looks fine. I "apply" this and reboot.

    On reboot I am not asked the disk passphrase (which didn't bother me too much, I was hoping that the partition manager would also create a keyfile to be able to mount the disk without intervention), but the partition is not mounted, but

    • it appears (with the luks type) in the partition manager
    • there is an an entry for it in /etc/fstab
    • there is no entry for it in /etc/crypttab

    In my previous machine (16.04) I had a similar setup but I did it by hand, so I can hopefully redo it, but I'm just hoping that 19.10 can do it in a more automated way, so what is missing? Did I miss an option in the Partition Manager? Or is the LUKS support incomplete?

    Edit: some (moderate) progress:

    • Delete the partition and recreated it, it appears to have an ext4 filesystem on it (had to ask the PM to rescan to see it).
    • FS appears in fstab bit not cryptab
    • Reboot takes a lot longer, from approx. 40" to 2'10. systemd-analyze says that system boot tile is normal (17") but user-space is slow (1'55").
    • In the booted system the filesystem is not mounted (first checked in a TTY before graphic login, and after graphic login)
    • The "Encrypted drive" appears in Dolphin "places".
    • If I click on it I get asked the passphrase
    • Then I get an error bar in Dolphin saying that the device is already mounted

    Is all this normal?
    Last edited by Ofnuts; Feb 11th 2020 at 11:46 PM. Reason: More info

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