COMPLETE FIX -- Ubuntu Utopic Unicorn 14.10 -- The disk drive dev/mapper/cryptoswap1 is notready yet or not present (Also works for 14.04 and 15.04)

fix_dev_mapper_cryptoswap1_is_not_ready_yet_or_not_present.md

#Ultimate solution for this:

#http://askubuntu.com/questions/289858/disk-drive-for-dev-mapper-cryptswap-1-is-not-ready

Run the following command:

sudo gedit /etc/fstab

Then, using gedit, or vim, replace the following line:

/dev/mapper/cryptswap1 none swap sw 0 0

with a line, as follows, that adds , noauto to read:

/dev/mapper/cryptswap1 none swap sw, noauto 0 0

Then run the following command to edit your /etc/rc.local file:

sudo gedit /etc/rc.local

Immediately before the line that reads

exit 0

add these two lines:

sleep 5

swapon /dev/mapper/cryptswap1

Now,

I had the same issue. Eventually it turned out that the device in /etc/crypttab was wrong.

The system was installed from a USB pen-drive.

Because of this, during installation, the pen-drive was /dev/sda and the hard disc was /dev/sdb.

The swap partition was hence written into /etc/crypttab as /dev/sdb6.

After booting from the harddrive this became /dev/sda6 and the mapper could not find it any more.

To fix this just correct the line in /etc/crypttab to the correct /dev/sd?? or the UUID of the swap partition.

For example, if your swap is on /dev/sda4, you would change the following file:

cryptswap1 UUID=9086ae06-9274-4627-adab-d3baae1e4ee3 /dev/urandom swap,cipher=aes-cbc-essiv:sha256

You would have a different UUID, of course. My UUID was 9086ae06-9274-4627-adab-d3baae1e4ee3.

To look like this:

cryptswap1 /dev/sda6 /dev/urandom swap,cipher=aes-cbc-essiv:sha256

You would have a different /dev entry for your swap partition, of course. My /dev entry for my swap partition was /dev/sda6.

I found it by installing gparted, running sudo gparted, and looking for a partition that had a type "unknown".

I also looked in /etc/fstab for something like "# swap was on /dev/sda6 during installation", just to be sure.

/dev/sda6 was the /dev entry.

Hi there

I am new to Linux but learning and willing. Been trying to fix this exact problem but I keep coming up with all kinds of errors that no one makes mention of so I am hoping that you might be able to guide me. Please bear in mind that I am new but trying to learn and I thank you for your time and patience.
So I get to the third step: and change the line to noauto, (do I save the gedit document?)
Then I try to run: sudo gedit /etc/rc.local but I get an error message:
(gedit:2787): Gtk-WARNING **: Calling Inhibit failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files

What do I do? I have tried all the other suggestions and I keep getting error messages. I need to back up my computer and then install a new version of linux but it wont accept any of my external devices because the dev/mapper/ cryptoswap1 is not working properly.

Any help would be greatly appreciated, thank you.
Paris