Further testing and research:
I used the server CD that successfully upgraded my server from natty to oneiric, and it failed at the same stage.
On the server, main.log showed repositories being disabled, then
'running doUpdate() (showErrors=True)'
On the workstation, at the same stage in the process, it logged "AptCdrom.add() called with '/media/cdrom0'", this time with:
2011-09-24 11:19:27,896 ERROR IOError/SystemError in cache.update(): 'W:Failed to fetch cdrom://Ubuntu-Server 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
(The server ISO from 1 Sept daily build was used to create the CD).
The call to doUpdate() (showErrors=True) was logged immediately after 'AptCdrom.add() returned: True'
Further testing and research:
I used the server CD that successfully upgraded my server from natty to oneiric, and it failed at the same stage.
On the server, main.log showed repositories being disabled, then
'running doUpdate() (showErrors=True)'
On the workstation, at the same stage in the process, it logged "AptCdrom.add() called with '/media/cdrom0'", this time with: /Ubuntu- Server 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
2011-09-24 11:19:27,896 ERROR IOError/SystemError in cache.update(): 'W:Failed to fetch cdrom:/
(The server ISO from 1 Sept daily build was used to create the CD).
The call to doUpdate() (showErrors=True) was logged immediately after 'AptCdrom.add() returned: True'