I cannot mount encrypted partition

Hi
I encrypted a partition of my hard. I use that partition for many weeks. But now i cannot mount that! When i try to mount i show this message:


Error unlocking /dev/sda4: Command-line `cryptsetup luksOpen "/dev/sda4" "luks-78588098-1aa1-4971-b542-44520b970bbf" ' exited with non-zero exit status 2: No key available with this passphrase.
 (udisks-error-quark, 0)

can i use dictionary attack? my password is only numbers and i can limited the words of dictionary

pleas help me! all of my researchs is in that partition :’(:’(

I use such disks and no problem. So you use codes like

sudo cryptsetup luksOpen /dev/sdx# MyDisk
sudo mount /dev/mapper/MyDisk /mnt/somewhere

First of all, are you really absolutely sure your disk is sda4? Why do you use as partition name luks-…? I’m not sure if it is required (I don’t think so), but I use disk’s label. Otherwise, I’d check the disk with SMART and testdisk to see if it is not corrupted.

Please show the complete command which produced the error message above.

Do you use a passphrase or a key file to unlock your partition?

Best regards

susejunky