[arch-general] update of chroot fails - error: cannot remove file '/sys/': Read-only file system

[Martti Kühne]

On Tue, Jun 26, 2012 at 10:02:07AM -0500, David C. Rankin wrote:
> Guys,
> 
>   Attempting to update an arch chroot (only a couple days old), I have run into
> the following error:
> 
> sudo mkarchroot -u $CHROOT/root
> :: Synchronizing package databases...
>  core is up to date
>  extra is up to date
>  community is up to date
>  local is up to date
> :: Starting full system upgrade...
> resolving dependencies...
> looking for inter-conflicts...
> 
> Targets (12): dbus-core-1.6.0-4  e2fsprogs-1.42.4-1  filesystem-2012.6-4
> hwids-20120611-1  iproute2-3.4.0-2
>               iputils-20101006-3  kmod-9-1  libsystemd-185-2  libusbx-1.0.12-1
> linux-3.4.4-2  systemd-tools-185-2
>               xz-5.0.4-1
> 
> Total Installed Size:   71.36 MiB
> Net Upgrade Size:       0.49 MiB
> 
> Proceed with installation? [Y/n]
> (12/12) checking package integrity
> [#######################################] 100%
> (12/12) loading package files
> [#######################################] 100%
> (12/12) checking for file conflicts
> [#######################################] 100%
> error: cannot remove file '/sys/': Read-only file system
> error: could not commit transaction
> error: failed to commit transaction (transaction aborted)
> Errors occurred, no packages were upgraded.
> 
>   How do I fix this? Is this another filesystem update issue like with
> filesystem-2012.6-2?
> 

mount / -o rw -- that is, something seems to be going wrong with your fstab.