Public bug reported:
I have a laptop that was running 18.04,
20.04 would not install.
21.04 also failed.
Fedora 34 installed without issue.
Ubuntu GUI said
The installer encountered an error copying files to the hard disk:
[Errno 5]
dmesg said
SQUASHFS error: zlib decompression failed, data probably corrupt
SQUASHFS error: failed to read block 0x2df825be: -5
/var/log/casper.log said
cannot read /var/lib/dpkg/info/diffutils.list (Input/output error)
the iso sha matches, badblocks and cat found no issues with the source or
destination disk.
** Affects: base-installer (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1927999
Title:
20.04 installer Errno 5
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