If you have been redirected to this page, it means that your installation of Ubuntu or a flavour failed.
If you search in the log file /var/log/syslog, you'll see messages like above:
Apr 24 00:01:40 ubuntu kernel: [ 329.409695] SQUASHFS error: zlib decompression failed, data probably corrupt Apr 24 00:01:40 ubuntu kernel: [ 329.409704] SQUASHFS error: squashfs_read_data failed to read block 0x37545 This failure is usually caused by bad ISO download, corrupted install media, or device failure. We suggest you verify your ISO download, your installation medium or use another USB stick. You may also find useful information in this tutorial: https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu If you experienced an issue during installation and think it is not caused by a corrupted installation media, do not hesitate to report a bug by running the following command from a terminal: $ ubuntu-bug ubiquity Thanks for using Ubuntu. [Do not close or re-assign this report] [It's used to help users using faulty USB sticks]
Kristoffer Grundström (umeaman) wrote on 2020-05-25:
The weird thing about this is that I know that my USB stick is working properly since I can burn the 16.04 LTS iso on it and complete the installation without any issues.
It also works with other iso files for other Linux distros regardless of what what version I use.
For instance, Mageia (RPM based distro forked from Mandriva) 6.1, 7, 7.1 and Cauldron (Unstable release for the upcoming version of Mageia 8).
Could be that firefox didn't download a correct iso image before I burnt it.
What is it that causes this to happen especially with Ubuntu?
Kristoffer Grundström (umeaman) wrote on 2020-05-28:
I downloaded and checked the iso once again and it was deemed OK. Still this issue appears only with this version of Ubuntu back to 16.04.
16.04 works just fine.
If the USB stick works otherwise just fine to install either Windows and/or Mageia there has to be something wrong with the installer ubiquity.
Chris Guiver (guiverc) wrote on 2020-05-28:
@Kristoffer / umeaboy - the most common failure in my experience is the WRITE to the install media (assuming your ISO was checked after download & computed valid).
For releases up to (but not including) 20.04, see https://help.ubuntu.com/community/Installation/CDIntegrityCheck where “Check Disc for Defects” will validate your install media (be it cd/dvd/hdd/ssd/thumb-drive/flash-card) and not where you are installing to.
You can check `dmesg` to look for squashfs errors (in a terminal if you're using 'live' installer), or in filed bug reports, where the device where the squashfs errors occurred will be your install media if you've been sent to this report. It maybe a faulty ISO, bad write to install media (what my link/CDIntegrityCheck will validate), failing/faulty device, or combination.
eli (elicanup) wrote on 2020-07-09:
same issue when installing in virtualbox. I verified the checksums of the iso and they were correct. I would assume then, that there is an issue with the installer since it also fails on bare metal as well as here.
Juha Tiihonen (jiitee) wrote on 2020-07-09: Re: [Bug 1874662] Re: Corrupted installation medium
Disabling hyper-v in windows helped! The error message seems to be totally wrong.
to 9. heinäk. 2020 klo 4.10 eli <email address hidden> kirjoitti:
[…]
same issue when installing in virtualbox. I verified the checksums of the iso and they were correct. I would assume then, that there is an issue with the installer since it also fails on bare metal as well as here.
–
You received this bug notification because you are subscribed to a duplicate bug report (1875510).
https://bugs.launchpad.net/bugs/1874662
Title: Corrupted installation medium
Status in Ubuntu: Triaged
Bug description:
If you have been redirected to this page, it means that your > installation of Ubuntu or a flavour failed.
If you search in the log file /var/log/syslog, you'll see messages like above:
Apr 24 00:01:40 ubuntu kernel: [ 329.409695] SQUASHFS error: zlib decompression failed, data probably corrupt Apr 24 00:01:40 ubuntu kernel: [ 329.409704] SQUASHFS error: squashfs_read_data failed to read block 0x37545 This failure is usually caused by bad ISO download, corrupted install media, or device failure. We suggest you verify your ISO download, your installation medium or use another USB stick. You may also find useful information in this tutorial: [[https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu]] If you experienced an issue during installation and think it is not caused by a corrupted installation media, do not hesitate to report a bug by running the following command from a terminal: $ ubuntu-bug ubiquity Thanks for using Ubuntu. [Do not close or re-assign this report] [It's used to help users using faulty USB sticks] To manage notifications about this bug go to: [[https://bugs.launchpad.net/ubuntu/+bug/1874662/+subscriptions]]
nucc1 (nucc1) wrote on 2020-07-19: #6
I was about to reply @guiverc to rant about how unlikely corrupt media is when you download something over TLS and the download wasn't truncated, then I read @jiitee's comment.
I didn't have hyper-v enabled, but I had WSL and thus virtualization services. Turning WSL and Virtualisation Services off allowed me to install ubuntu 20.04 successfully in virtualbox.
MADUPOJU SANJAY KUMAR (sanjaym88) wrote on 2020-08-12:
I'm unable to install
Eric Mintz (mintz-eric) wrote on 2020-08-12: #9
I reimaged my install stick, then tried the installation (install USB → destination USB) on a bigger and faster computer. It worked fine the second time.
I made the first attempt on a repurposed Asus CR-16 Chromebook that had been upgraded to 8 Gb memory and 128 Gb SSD, and the second on an ASRock X99 Extreme based build (6 Core Intel server CPU, 64 Gb error correcting memory). Perhaps the install simply needed more memory, though I cannot see why.
On Wed, Aug 12, 2020 at 8:31 AM MADUPOJU SANJAY KUMAR «email address hidden» wrote:
[...] > I'm unable to install > -- You received this bug notification because you are subscribed to a duplicate bug report (1891170). https://bugs.launchpad.net/bugs/1874662 Title: Corrupted installation medium Status in Ubuntu: Fix Released Bug description: If you have been redirected to this page, it means that your installation of Ubuntu or a flavour failed. If you search in the log file /var/log/syslog, you'll see messages like above: Apr 24 00:01:40 ubuntu kernel: [ 329.409695] SQUASHFS error: zlib decompression failed, data probably corrupt Apr 24 00:01:40 ubuntu kernel: [ 329.409704] SQUASHFS error: squashfs_read_data failed to read block 0x37545 This failure is usually caused by bad ISO download, corrupted install media, or device failure. We suggest you verify your ISO download, your installation medium or use another USB stick. You may also find useful information in this tutorial: https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu If you experienced an issue during installation and think it is not caused by a corrupted installation media, do not hesitate to report a bug by running the following command from a terminal: $ ubuntu-bug ubiquity Thanks for using Ubuntu. [Do not close or re-assign this report] [It's used to help users using faulty USB sticks] To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+bug/1874662/+subscriptions
Lucas Villela Neder Issa (lucas-issa) wrote on 2020-08-29:
I'd like to add some more information to help so solve this bug.
In my case I'm pretty sure that it is a bug. I think it is hardware compatibility problem. In my case it does not seems to be a faulty hardware problem.
Using exactly the same hardware with the same USB stick (SD card with USB card adapter) I could install 3 different OS (Windows, Manjaro and Debian) without problems and the computer has been used without problems. But I've tried (many tries) some different flavors and versions of Ubuntu and all of then had the same problem as described in this bug issue.
I've tested memory with memtest89+. No errors was found.
I've checked the ISO image with checksum.
I've ran cmp between ISO file and USB stick.
Laptop configuration:
Acer TravelMate|P (TMP449-G2-M) whith HD changed to SSD (Crucial BX500 240GB)
RAM: 8GB
Processor: Intel Core i5-7200U CPU @ 2.50GHz x 4
Graphics: Only Intel HD Graphics 620 (KBL GT2)
I've also tried to install in a other older laptop and exactly the same problem happen.
I've used the same SSD.
Older laptop configuration:
Acer Travel 3260 series whith HD changed to SSD (Crucial BX500 240GB)
RAM: 3GB
Processor: Intel Core Duo (32bits)
So I believe that the compatibility problem is related with the SSD. In my case with this specific SSD: Crucial BX500.
Observation:
I have 2 Crutial BX500 running in 2 different computers without problems. One is running using only Windows 10 and other one is running Windows 10 and Manjara (the first configuration described).
I hope this information can help to solve this bug.
DIRIBARNE Christophe (chrisf6) wrote on 2021-03-17:
I got this problem. With ubuntu 20.04 and 20.10. The downloaded iso was ok. Checked by SHA-256 hash sum.
Bootable usb device made with Rufus under Windows 8.1.
Got bloc errors : 2. But no problems found with chkdsk.
The check at the linux set up start gives 1 error too.
The squashfs errors occur.
With ubuntu 20.10.
On the usb device there is a directory casper with a large file filesystem.squashfs.
Compare for that file the SHA-256 hash sum between original iso and usb device one : got different. But sizes was the same.
Just rewrite this erroneous file from the original iso to the usb device. Ok with a simple drag and drop.
Usb device file SHA-256 hash sum now OK.
Check at the linux set up start now OK.
And finally linux install was OK, with no more the SQUASHFS errors.
Si vous avez été redirigé vers cette page, c'est que votre installation d'Ubuntu ou d'une variante a échoué.
En consultant le fichier journal /var/log/syslog, vous verrez des messages comme ceux mentionnés ci-dessus :
Apr 24 00:01:40 ubuntu kernel: [ 329.409695] SQUASHFS error: zlib decompression failed, data probably corrupt Apr 24 00:01:40 ubuntu kernel: [ 329.409704] SQUASHFS error: squashfs_read_data failed to read block 0x37545 This failure is usually caused by bad ISO download, corrupted install media, or device failure. We suggest you verify your ISO download, your installation medium or use another USB stick. You may also find useful information in this tutorial: https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu If you experienced an issue during installation and think it is not caused by a corrupted installation media, do not hesitate to report a bug by running the following command from a terminal: $ ubuntu-bug ubiquity Thanks for using Ubuntu. [Do not close or re-assign this report] [It's used to help users using faulty USB sticks]
Kristoffer Grundström (umeaman) a écrit le 2020-05-25 :
Le plus étrange dans tout ça, c'est que je sais que ma clé USB fonctionne correctement puisque je peux y graver l'iso 16.04 LTS et terminer l'installation sans aucun problème.
Cela fonctionne également avec d'autres fichiers iso pour d'autres distros Linux, quelle que soit la version que j'utilise.
Par exemple, Mageia (distro basée sur un RPM dérivé de Mandriva) 6.1, 7, 7.1 et Cauldron (version instable pour la prochaine version de Mageia 8).
Il se peut que firefox n'ait pas téléchargé une image iso correcte avant que je ne la grave.
Qu'est-ce qui fait que cela arrive surtout avec Ubuntu ?
Kristoffer Grundström (umeaman) a écrit le 2020-05-28 :
J'ai téléchargé et vérifié l'iso une fois de plus et il a été jugé OK. Mais ce problème n'apparaît qu'avec cette version d'Ubuntu, jusqu'à la 16.04.
La version 16.04 fonctionne très bien.
Si la clé USB fonctionne par ailleurs très bien pour installer Windows et/ou Mageia, il doit y avoir un problème avec l'installateur ubiquity.
Chris Guiver (guiverc) a écrit le 2020-05-28 :
@Kristoffer / umeaboy - d'après mon expérience, l'échec le plus courant est l'écriture sur le support d'installation (en supposant que votre ISO ait été vérifié après le téléchargement et compté comme valide).
Pour les versions jusqu'à (mais pas y compris) 20.04, voir https://help.ubuntu.com/community/Installation/CDIntegrityCheck où “Check Disc for Defects” validera votre média d'installation (que ce soit cd/dvd/hdd/ssd/thumb-drive/flash-card) et non l'endroit où vous l'installez.
Vous pouvez vérifier `dmesg` pour rechercher les erreurs squashfs (dans un terminal si vous utilisez l'installateur 'live'), ou dans les rapports de bogues archivés, où le périphérique sur lequel les erreurs squashfs se sont produites sera votre média d'installation si vous avez été envoyé à ce rapport. Il peut s'agir d'une ISO défectueuse, d'une mauvaise écriture sur le média d'installation (ce que mon lien/CDIntegrityCheck validera), d'un périphérique défaillant ou défectueux, ou d'une combinaison des deux.