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I was installing 32-bit Ubuntu(ubuntu-10.10-desktop-i386.iso) on my IBM Thinkpad T510 laptop. During installation an error came up with the following text.

(initramfs) mount: mounting dev/loop0 on //filesystem.squashfs failed: Input/Output error Can not mount /dev/loop0 (/cdrom/casper/filesystem.squashfs) on //filesystem.squashfs

I did a memory test which was successful, but when selecting "Try Ubuntu without installing", "Install Ubuntu" or "Check disk for defects" the same error is showing up.

Please help.

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did you check that iso image was properly downloaded and burned to cd? –  bbaja42 Oct 11 '10 at 14:05
    
Please don't crosspost between Stack Exchange sites, especially without notice, as it needlessly duplicates effort for answerers. –  Gilles Oct 11 '10 at 19:30
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2 Answers

Seems like a bad download, check for the MD5 sum using WinMD5 Sum and compare it against the MD5sums listed:

a8d8e24bf8b82b4302d074fcac380d65 *ubuntu-10.10-alternate-amd64.iso
419ad8ee1bb76a49490f4a08b5be43f0 *ubuntu-10.10-alternate-i386.iso
1b9df87e588451d2ca4643a036020410 *ubuntu-10.10-desktop-amd64.iso
59d15a16ce90c8ee97fa7c211b7673a8 *ubuntu-10.10-desktop-i386.iso
6877bf8d673b87ba9500b0ff879091d0 *ubuntu-10.10-netbook-i386.iso
ab66a1d59a8d78e9ea8ef9b021d6574a *ubuntu-10.10-server-amd64.iso
ce1cee108de737d7492e37069eed538e *ubuntu-10.10-server-i386.iso
d1db1f93bb7486593b7d1ea023c0e3f8 *wubi.exe

If the MD5 sums don't match, you'll have to redownload

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This helps a lot, thank you! –  NPC Apr 1 '11 at 7:15
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Might be a problem with either the image or the burn. Verify the checksum of the image, or try a lower burn speed.

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I download the ISO image from Ubuntu website "ubuntu.com/desktop/get-ubuntu/download"; here i couldn't find any checksum information. I was able to mount the ISO image from windows and browse the contents. –  AJP Oct 11 '10 at 14:16
    
I am installing Ubuntu inside VMWare Workstation 7.1 –  AJP Oct 11 '10 at 14:17
    
A little poking around found this: help.ubuntu.com/community/BurningIsoHowto –  Ignacio Vazquez-Abrams Oct 11 '10 at 14:19
    
The ISO image is mounted to a virtual drive in VMWare and not burned on to a CD. –  AJP Oct 11 '10 at 14:27
    
Although you directly downloaded it from the website... error still occur. It happens pretty regularly, at least for me. Check the checksum, or simply redownload the file –  KronoS Oct 11 '10 at 16:09
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