[Bug 848659] Re: Upgrade from natty fails with 64-bit oneiric beta cd (I/O error while reading CD)

[Tim Frost]

Agreed.

It *should* be fixed, but it only affects users if:
1: they are upgrading using a CD/DVD
AND
2: the media is bad
(and they have used that media without verifying that the file checksums are good)

Unfortunately, this will be hard to test, as it depends on having media
(such as a CD-RW disk) that is bad, that you can write the iso image to.


Given the nature of the failure, I suspect that an install from bad media would also fail with similar symptoms, because the error is being detected by /usr/lib/apt/methods/cdrom (or the installer equivalent) when scanning the package files

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Title:
  Upgrade from natty fails with 64-bit oneiric beta cd (I/O error while
  reading CD)

Status in “update-manager” package in Ubuntu:
  Incomplete
Status in “update-manager” source package in Oneiric:
  Won't Fix

Bug description:
  System is running 64-bit natty.  When I insert a CD burnt from image
  ubuntu-11.10-beta1-alternate-amd64.iso,  the upgrade process runs
  until it is attempting to process the i386 Packages files.  At that
  step, the upgrade process stops with error 'W:Failed to fetch
  cdrom://Ubuntu 11.10 _Oneiric Ocelot_ - Beta amd64
  (20110901)/dists/oneiric/main/binary-i386/Packages  Please use apt-
  cdrom to make this CD-ROM recognized by APT. apt-get update cannot be
  used to add new CD-ROMs'

  I note that the two i386 Packages.gz files are 20 bytes, corresponding
  to a zero-length uncompressed file.

  Contents of /var/log/dist-upgrade attached as a tar archive

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