install crash with IOError: [Errno 30] Read-only file system: '/target/usr/sbin/policy-rc.d' at the end from live Cd in try mode.

[laurentlm]

i start Ocelot live CD for rescue, try to install to another partition with ubiquity , after some grub-install error ubiquity crach at the close

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: ubiquity 2.8.7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
CasperVersion: 1.287
Date: Fri Oct 21 13:14:12 2011
LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcEnviron:
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Oct 20 23:03:40 ubuntu plugininstall.py: Traceback (most recent call last):
Oct 20 23:03:40 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1641, in <module>
Oct 20 23:03:40 ubuntu plugininstall.py: install.run()
Oct 20 23:03:40 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Oct 20 23:03:40 ubuntu plugininstall.py: func(self)
Oct 20 23:03:40 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 182, in run
Oct 20 23:03:40 ubuntu plugininstall.py: self.configure_hardware()
Oct 20 23:03:40 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 773, in configure_hardware
Oct 20 23:03:40 ubuntu plugininstall.py: install_misc.chroot_setup(self.target)
Oct 20 23:03:40 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 110, in chroot_setup
Oct 20 23:03:40 ubuntu plugininstall.py: f = open(policy_rc_d, 'w')
Oct 20 23:03:40 ubuntu plugininstall.py: IOError: [Errno 30] Read-only file system: '/target/usr/sbin/policy-rc.d'
Oct 20 23:03:40 ubuntu plugininstall.py:

[Brian Murray (brian-murray)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Reviewing your log files attached to this bug report it seems that there is a problem with the disk to which you are trying to install Ubuntu. I'd recommend performing a back up of your existing operating system and then investigating the situation. Measures you might take include checking cable connections for your disks and using software tools to investigate the health of your hardware. In the event that is is not in fact an error with your hardware please set the bug's status back to New. Thanks and good luck!