Ubuntu – Slow boot time after cloning disk and resizing partitions

bootfstabgpartedtimeoutUbuntu

I recently replaced an SSD with a larger SSD. I used Clonezilla to clone the old disk to the new one. After that I used GParted Live to resize the existing partition, pushing the swap partition to the end of the disk. I also updated from Ubuntu 16.04 to 18.04.

After successfully finishing above steps I notices that the boot time became much longer. I found a few similar threads (linked below) and tried what is suggested there. However, the boot time did not reduce to the amount before the disk change.

Here is my original /etc/fstab:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda1 during installation
UUID=e15b2ef7-c32d-46f5-a3a8-4bdc60285b4e /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda5 during installation
UUID=3a0c2581-52f2-4c92-9c4a-09d3f0258c05 none            swap    sw              0       0
/dev/disk/by-id/usb-Generic_USB_Flash_Disk-0:0 /mnt/usb-Generic_USB_Flash_Disk-0:0 auto nosuid,nodev,nofail,x-gvfs-show 0 0

I already replaced the UUID of the swap partition by looking into the blkid command output:

/dev/sda1: UUID="e15b2ef7-c32d-46f5-a3a8-4bdc60285b4e" TYPE="ext4" PARTUUID="000d7e8b-01"
/dev/sda5: LABEL="swap" UUID="839f9d78-77b2-491d-808d-8cd551a9eeef" TYPE="swap" PARTUUID="000d7e8b-05"

I also commented out the /dev/disk/by-id/usb-.. since I believe this was the USB stick which I booted GParted Live from. No idea why it is still defined there.

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda1 during installation
UUID=e15b2ef7-c32d-46f5-a3a8-4bdc60285b4e /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda5 during installation
# UUID=3a0c2581-52f2-4c92-9c4a-09d3f0258c05 none            swap    sw              0       0
UUID=839f9d78-77b2-491d-808d-8cd551a9eeef none            swap    sw              0       0
# /dev/disk/by-id/usb-Generic_USB_Flash_Disk-0:0 /mnt/usb-Generic_USB_Flash_Disk-0:0 auto nosuid,nodev,nofail,x-gvfs-show 0 0

The /var/log/boot.log shows the following:

         Starting Tell Plymouth To Write Out Runtime Data...
[  OK  ] Started Braille Device Support.
[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Braille Device Support.
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Reached target Sound Card.
[  OK  ] Started Braille Device Support.
[  OK  ] Started Tell Plymouth To Write Out Runtime Data.
[  OK  ] Started Raise network interfaces.
[ TIME ] Timed out waiting for device dev-disk-by\x2did-usb\x2dGeneric_USB_Flash_Disk\x2d0:0.device.
[DEPEND] Dependency failed for /mnt/usb-Generic_USB_Flash_Disk-0:0.
[ TIME ] Timed out waiting for device dev-disk-by\x2duuid-3a0c2581\x2d52f2\x2d4c92\x2d9c4a\x2d09d3f0258c05.device.
[DEPEND] Dependency failed for /dev/disk/by-uuid/3a0c2581-52f2-4c92-9c4a-09d3f0258c05.
[DEPEND] Dependency failed for Swap.
[  OK  ] Reached target System Initialization.
[  OK  ] Listening on UUID daemon activation socket.
[  OK  ] Listening on PC/SC Smart Card Daemon Activation Socket.
[  OK  ] Started Daily apt download activities.
...

The systemd-analyze command tells:

Startup finished in 36.037s (kernel) + 10.847s (userspace) = 46.885s
graphical.target reached after 10.835s in userspace

What can I do to improve the boot time?

Update

I looked into /var/log/boot.log again today and found this output – notice the time-out when searching for a device!:

         Starting Tell Plymouth To Write Out Runtime Data...
[  OK  ] Started Braille Device Support.
[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Braille Device Support.
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Reached target Sound Card.
[  OK  ] Started Braille Device Support.
[  OK  ] Started Tell Plymouth To Write Out Runtime Data.
[  OK  ] Started Raise network interfaces.    
[*     ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[**    ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[***   ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[ ***  ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[  *** ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[   ***] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[    **] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[     *] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[    **] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[   ***] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[  *** ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[ ***  ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[***   ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[**    ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[*     ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
[**    ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[***   ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[ ***  ] (2 of 2) A start job is running for dev-disk-by\x2duuid-3a0c2581\x2d5
[  *** ] (1 of 2) A start job is running for dev-disk-by\x2did-usb\x2dGeneric_
...
[ TIME ] Timed out waiting for device dev-disk-by\x2did-usb\x2dGeneric_USB_Flash_Disk\x2d0:0.device.
[DEPEND] Dependency failed for /mnt/usb-Generic_USB_Flash_Disk-0:0.
[ TIME ] Timed out waiting for device dev-disk-by\x2duuid-3a0c2581\x2d52f2\x2d4c92\x2d9c4a\x2d09d3f0258c05.device.
[DEPEND] Dependency failed for /dev/disk/by-uuid/3a0c2581-52f2-4c92-9c4a-09d3f0258c05.
[DEPEND] Dependency failed for Swap.
[  OK  ] Reached target System Initialization.
[  OK  ] Listening on UUID daemon activation socket.
[  OK  ] Listening on PC/SC Smart Card Daemon Activation Socket.
...

Related

Best Answer

I suspect that there is a 'resume' file

/etc/initramfs-tools/conf.d/resume

which points to the UUID that is no longer found. You can modify that file to point to the correct UUID for the swap partition, and run

sudo update-initramfs -u

See comments #16 and #17 in the following link to a bug report,

https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1763611

There is a difference between your case and the case in the bug report,

  • in your case you are using a swap partition
  • in the case of the bug report a swap file is used (so there is no swap partition, that should be pointed to).
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