cannot format a secondary partirtion with luks

[Marco Giusti <marco.giusti@xxxxxxxxx>]

hello list,
  i got an usb drive whit two partition and if i try to farmat the second
one and then mounting it, i got an error message.

    # cryptsetup -c blowfish luksFormat /dev/sdb2

    WARNING!
    ========
    This will overwrite data on /dev/sdb2 irrevocably.

    Are you sure? (Type uppercase yes): YES
    Enter LUKS passphrase: 
    Verify passphrase: 
    Command successful.
    # cryptsetup luksOpen /dev/sdb2 sdb2
    Enter LUKS passphrase: 
    Command failed: No key available with this passphrase.

but if i try the same with the first partition everything goes as
aspected:

    # cryptsetup -c blowfish luksFormat /dev/sdb1

    WARNING!
    ========
    This will overwrite data on /dev/sdb1 irrevocably.

    Are you sure? (Type uppercase yes): YES
    Enter LUKS passphrase: 
    Verify passphrase: 
    Command successful.
    # cryptsetup luksOpen /dev/sdb1 sdb1
    key slot 0 unlocked.
    Command successful.

first you for it, the password typed is correct and luksDump confirms it

    # cryptsetup luksDump /dev/sdb2
    Command failed: /dev/sdb2 is not a LUKS partition

    #

could i create a crypted filesyste in the second partition or have i
necessary use the first one?

cheers
m.

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