os-prober is very chatty in the syslog, and this may be more useful than
these (incomplete, I'm afraid) set -x dumps. Could you perhaps extract
the syslog messages emitted by a run of os-prober?
** Summary changed:
- windows not found unless partion is mounted
+ Windows not found unless
What's the output of:
sudo blkid -o value -s TYPE /dev/sda2
where /dev/sda2 is the windows partition in question?
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Title:
Windows not found
todd@todd-Latitude-E6420:~$ sudo blkid -o value -s TYPE /dev/sda2
ntfs
** Attachment added: os-prober_syslog.txt
https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1051306/+attachment/3396278/+files/os-prober_syslog.txt
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os-prober tries hard to determine types of the filesystem, and mounts
using those only. From the logs it appears that it failed it's attempts
at mounting the windows partition in question. Maybe os-prober should
fallback to 'auto' type, and then use that... but then 20microsoft uses
the passed
Now this is a long shot, but can you do this:
$ sudo mount -t auto /dev/sda2 /mnt
$ ls -la /mnt
$ sudo umount /mnt
$ sudo grub-mount /dev/sda2 /mnt
$ ls -la /mnt
$ sudo umount /mnt
Hopefully both ls calls are identical
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todd@todd-Latitude-E6420:~$ sudo mount -t auto /dev/sda2 /media/Windows/
todd@todd-Latitude-E6420:~$ sudo os-prober
/dev/sda2:Windows 7 (loader):Windows:chain
** Attachment added: os-prober_mounted_syslog.txt
So, I can't reproduce this here with my test copy of Windows 7,
unfortunately. If I could then this would be a lot easier.
I suspect that GRUB's NTFS driver (we use GRUB's filesystem drivers so
that we can do true read-only mounts, without running the risk of
replaying journals or similar) is
Not the same.
todd@todd-Latitude-E6420:~$ sudo mount -t auto /dev/sda2 /mnt
todd@todd-Latitude-E6420:~$ ls -la /mnt
total 5811870
drwxrwxrwx 1 root root 16384 Oct 11 13:17 .
drwxr-xr-x 24 root root 4096 Oct 12 08:07 ..
-rwxrwxrwx 1 root root 24 Jun 10 2009 autoexec.bat
@ snooptodd
Can you do all of this as root for the grub-mount? above. Sorry didn't
realise grub-mount is that protective.
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Title:
Windows not
sudo ls -la /mnt doesnt give the correct result either.
grub_mount syslog
Oct 12 09:04:03 todd-Latitude-E6420 ntfs-3g[4042]: Version 2012.1.15AR.5
external FUSE 29
Oct 12 09:04:03 todd-Latitude-E6420 ntfs-3g[4042]: Mounted /dev/sda2
(Read-Write, label , NTFS 3.1)
Oct 12 09:04:03
You still haven't actually given me the output of 'sudo ls -l /mnt'.
Please could you run the *exact* sequence of commands I gave, with no
variation, and show the output of those?
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@Colin Watson
todd@todd-Latitude-E6420:~$ sudo grub-mount /dev/sda2 /mnt
todd@todd-Latitude-E6420:~$ sudo ls -l /mnt
total 0
todd@todd-Latitude-E6420:~$ sudo ls -l /mnt/boot
ls: cannot access /mnt/boot: No such file or directory
todd@todd-Latitude-E6420:~$ sudo umount /mnt
Ooh. Well, I may not have been able to reproduce on my test machine,
but on my normal development laptop, 'sudo grub-mount /dev/sda5 /mnt'
results in an empty /mnt, where /dev/sda5 is my root partition and is
certainly not empty. Oh dear. Investigating.
** Package changed: os-prober (Ubuntu
I can also reproduce this with upstream trunk; and have verified that
it's not present in precise.
** Tags added: regression-release
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Title:
My current belief is that this bug is triggered by the presence of a
symlink to a directory.
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Title:
Windows not found unless partition is
** Changed in: grub2 (Ubuntu Quantal)
Status: Triaged = In Progress
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Title:
Windows not found unless partition is mounted
To manage
From syslog (added some context, windows partition is sda1):
Not mounted:
macosx-prober: debug: /dev/sda1 is not an HFS+ partition: exiting
50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/20microsoft
20microsoft: debug: /dev/sda1 is a NTFS partition
50mounted-tests: debug:
** Branch linked: lp:~ubuntu-core-dev/ubuntu/quantal/grub2/quantal
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Title:
Windows not found unless partition is mounted
To manage
** Changed in: grub2 (Ubuntu Quantal)
Status: In Progress = Fix Committed
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Title:
Windows not found unless partition is mounted
To
This bug was fixed in the package grub2 - 2.00-7ubuntu10
---
grub2 (2.00-7ubuntu10) quantal; urgency=low
* Ignore symlink traversal failures in grub-mount readdir (LP: #1051306).
-- Colin Watson cjwat...@ubuntu.com Fri, 12 Oct 2012 17:14:04 +0100
** Changed in: grub2 (Ubuntu
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