Ubuntu Customization Kit

UCK won't unpack squashfs image

Asked by Jeremy Paul

I am running Ubuntu 11.04, my kernel version is 2.6.38-10-generic-pae i686, I'm trying to customize Ubuntu 11.04 with kernel version 2.6.38-10-generic-pae i686.

This is the build.log file contents:

Build (/usr/bin/uck-gui --wait-before-exit) started at 2011-07-26 15:51:58
>> Ubuntu Customization Kit 2.4.4 on Ubuntu 11.04, 2.6.38-10-generic-pae i686
Starting CD remastering on Tue Jul 26 15:52:01 BST 2011
Customization dir=/home/jeremy/tmp/customization-scripts
Mounting ISO image...
Unpacking ISO image...
Unmounting ISO image...
Mounting SquashFS image...
Unpacking SquashFS image...
cp: reading `/home/jeremy/tmp/remaster-root-mount/usr/lib/libicudata.so.44.2': Input/output error
cp: reading `/home/jeremy/tmp/remaster-root-mount/usr/share/example-content/Ubuntu_Free_Culture_Showcase/Josh Woodward - Swansong.ogg': Input/output error
Unmounting /home/jeremy/tmp/remaster-root-mount...
Cannot copy files from /home/jeremy/tmp/remaster-root-mount to /home/jeremy/tmp/remaster-root, error=1
Build ended at 2011-07-26 15:54:01

Thanks

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Revision history for this message
Wolf Geldmacher (wolf-womaro) said : 		#1

With a very high probability the ISO image you are trying to use is broken (incomplete or corrupted).

Try downloading another copy.

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Heftiorous Garrifulio (heftiorous) said : 		#2

I don't think this is the problem: I've got the same problem, and I downloaded many copies of ISO. The answer was always the same thing: are "Breezy Badger", "Oniric Ocelot", "Natty Narwhal", and "Hardy Heron" incomplete or corrupted?

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Wolf Geldmacher (wolf-womaro) said : 		#3

The way to check whether the iso images you downloaded are corrupt or not is to verify the md5 and/or sha1 checksums for the image. You should find them at the same place you found the ISO images.

and yes: I've seen mirrors - especially "transparent" ones maintained by cheap internet providers - that would corrupt large (i.e. >300MB) images regularly due to limitations they had with their uplink...

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Tong Sun (suntong001) said : 		#4

> I downloaded many copies of ISO. The answer was always the same thing: are "Breezy Badger", "Oniric Ocelot", "Natty Narwhal", and "Hardy Heron" incomplete or corrupted?

With so many people having same problem with so many versions/attempts, I highly doubt it is the corrupted ISO image.

> Mounting ISO image...
> Unpacking ISO image...
> Unmounting ISO image...
> Mounting SquashFS image...
> Unpacking SquashFS image...
> cp: reading `/home/jeremy/tmp/remaster-root-mount/usr/lib/libicudata.so.44.2': Input/output error

It shows clearly that the ISO is mounted fine, the SquashFS image unpacked fine. I doubt it has something to do with the unpacked media, not the ISO itself.

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Wolf Geldmacher (wolf-womaro) said : 		#5

Your comment is not helpful:

1) Regarding downloads causing the type of problem described:
- I've seen plenty of cases, where downloading/copying damaged the image.
- I've yet to see a single instance where the checksum was ok and the extraction failed.
- There is some indication that most users can download ISO's and use them without
   problems, whereas a tiny minority seems to consistently have problems - your
   statement that many people are having troubles is false.

2) Your second statement "ISO mounted find, SquashFS image unpacked fine" is also
    misleading, if not plainly wrong: "remaster-mount-root" is the place the ISO is
    mounted on and not being able to read from there means something is amiss with
    the image in almost any possible scenario.

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Wolf Geldmacher (wolf-womaro) said : 		#6

P.S.: If Jeremy is still following this thread I'd really be interested as to his findings.

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