* [Bug 16227] New: Mount command sees partition 2 and partition 7 as same partition
@ 2010-06-16 16:29 bugzilla-daemon
2010-06-16 16:33 ` [Bug 16227] " bugzilla-daemon
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: bugzilla-daemon @ 2010-06-16 16:29 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=16227
URL: http://bugs.centos.org/view.php?id=3601
Summary: Mount command sees partition 2 and partition 7 as same
partition
Product: File System
Version: 2.5
Kernel Version: 2.6.18-164.6.1.el5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext3
AssignedTo: fs_ext3@kernel-bugs.osdl.org
ReportedBy: eugene.blanchard@sait.ca
Regression: No
When mounting multiple partitions, partition 7 sees partition 2 instead of
partition 7. Partition scheme is as follows:
/dev/hda1 /boot
/dev/hda2 /
/dev/hda3 swap
/dev/hda4 extended partition
/dev/hda5 / (copy of /dev/hda2)
/dev/hda6 / (copy of /dev/hda2)
/dev/hda7 / (copy of /dev/hda2)
After copying /dev/hda2 to each partition using Gparted, I boot to /dev/hda2
and mount /dev/hda5, /dev/hda6 and /dev/hda7 to /mnt/p5, /mnt/p6, /mnt/p7
respectively. /mnt/p5 and /mnt/p6 work as expected.
Here's the problem: /mnt/p7 - any modifications to it's files, modifies
/dev/hda2 partition's files and vice versa.
I have reproduced this across several different machines: HP DL360s, PCs, etc..
using PATA, SATA and SCSI drives.
If I only mount p7, then partition p7 works as expected. This bug is originally
documented in the CentOS bug tracker listed in the URL.
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* [Bug 16227] Mount command sees partition 2 and partition 7 as same partition
2010-06-16 16:29 [Bug 16227] New: Mount command sees partition 2 and partition 7 as same partition bugzilla-daemon
@ 2010-06-16 16:33 ` bugzilla-daemon
2010-06-16 17:58 ` bugzilla-daemon
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2010-06-16 16:33 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=16227
--- Comment #1 from Eugene Blanchard <eugene.blanchard@sait.ca> 2010-06-16 16:33:20 ---
More details available at CentOS bug tracker URL listed above.
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* [Bug 16227] Mount command sees partition 2 and partition 7 as same partition
2010-06-16 16:29 [Bug 16227] New: Mount command sees partition 2 and partition 7 as same partition bugzilla-daemon
2010-06-16 16:33 ` [Bug 16227] " bugzilla-daemon
@ 2010-06-16 17:58 ` bugzilla-daemon
2010-06-17 16:59 ` bugzilla-daemon
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2010-06-16 17:58 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=16227
Eric Sandeen <sandeen@redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sandeen@redhat.com
--- Comment #2 from Eric Sandeen <sandeen@redhat.com> 2010-06-16 17:58:12 ---
This is certainly not an ext3 bug, and almost certainly not a kernel bug; my
money is on user error, but there's really not enough information to know.
output from:
# fdisk -l /dev/sda
and
# cat /proc/mounts
when you see this problem would be a start. I'll take a quick look at that
output, but I'm hovering over the "NOTABUG" button, at least for the kernel bug
tracker.
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* [Bug 16227] Mount command sees partition 2 and partition 7 as same partition
2010-06-16 16:29 [Bug 16227] New: Mount command sees partition 2 and partition 7 as same partition bugzilla-daemon
2010-06-16 16:33 ` [Bug 16227] " bugzilla-daemon
2010-06-16 17:58 ` bugzilla-daemon
@ 2010-06-17 16:59 ` bugzilla-daemon
2010-06-17 17:34 ` bugzilla-daemon
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2010-06-17 16:59 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=16227
--- Comment #3 from Eugene Blanchard <eugene.blanchard@sait.ca> 2010-06-17 16:59:00 ---
Using 7 partitions, this bug is reproduceable using SATA, PATA and SCSI drives
on multiple servers. I first ran into this in 2009-05-01 and posted to the
CentOS bug tracker. Today, I reloaded my server configuration and went to 9
partitions using the exact same documented procedure and all partitions
functioned properly without interaction as noted in this bug report. This bug
may only pertain to 7 partitions and the interaction between the primary
partition 2 and the logical partition 7.
fdisk -l /dev/cciss/c0d0
Disk /dev/cciss/c0d0: 72.8 GB, 72833679360 bytes
255 heads, 63 sectors/track, 8854 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/cciss/c0d0p1 * 1 13 104391 83 Linux
/dev/cciss/c0d0p2 14 905 7164990 83 Linux
/dev/cciss/c0d0p3 8758 8854 779152+ 82 Linux swap /
Solaris
/dev/cciss/c0d0p4 906 8757 63071190 5 Extended
/dev/cciss/c0d0p5 906 1798 7172991 83 Linux
/dev/cciss/c0d0p6 1799 2691 7172991 83 Linux
/dev/cciss/c0d0p7 2692 3584 7172991 83 Linux
cat /proc/mounts
rootfs / rootfs rw 0 0
/dev/root / ext3 rw,data=ordered 0 0
/dev /dev tmpfs rw 0 0
/proc /proc proc rw 0 0
/sys /sys sysfs rw 0 0
/proc/bus/usb /proc/bus/usb usbfs rw 0 0
devpts /dev/pts devpts rw 0 0
/dev/cciss/c0d0p1 /boot ext3 rw,data=ordered 0 0
tmpfs /dev/shm tmpfs rw 0 0
none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
/etc/auto.misc /misc autofs
rw,fd=7,pgrp=2909,timeout=300,minproto=5,maxproto=5,indirect 0 0
-hosts /net autofs
rw,fd=13,pgrp=2909,timeout=300,minproto=5,maxproto=5,indirect 0 0
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* [Bug 16227] Mount command sees partition 2 and partition 7 as same partition
2010-06-16 16:29 [Bug 16227] New: Mount command sees partition 2 and partition 7 as same partition bugzilla-daemon
` (2 preceding siblings ...)
2010-06-17 16:59 ` bugzilla-daemon
@ 2010-06-17 17:34 ` bugzilla-daemon
2010-06-17 17:42 ` bugzilla-daemon
2010-06-17 18:11 ` bugzilla-daemon
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2010-06-17 17:34 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=16227
--- Comment #4 from Eric Sandeen <sandeen@redhat.com> 2010-06-17 17:33:57 ---
I was sorta hoping for /proc/mounts when you saw this problem of one mount
affecting the other; you only have /dev/cciss/c0d0p1 mounted there it seems.
My money is on mounting the same device to 2 mountpoints.
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* [Bug 16227] Mount command sees partition 2 and partition 7 as same partition
2010-06-16 16:29 [Bug 16227] New: Mount command sees partition 2 and partition 7 as same partition bugzilla-daemon
` (3 preceding siblings ...)
2010-06-17 17:34 ` bugzilla-daemon
@ 2010-06-17 17:42 ` bugzilla-daemon
2010-06-17 18:11 ` bugzilla-daemon
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2010-06-17 17:42 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=16227
--- Comment #5 from Eugene Blanchard <eugene.blanchard@sait.ca> 2010-06-17 17:42:29 ---
After booting to parition p2 root / (p1 is /boot, p3 is swap)
I created the following directories:
/mnt/p5
/mnt/p6
/mnt/p7
Then mounted using the following commands:
mount /dev/cciss/c0d0p5 /mnt/p5
mount /dev/cciss/c0d0p5 /mnt/p6
mount /dev/cciss/c0d0p5 /mnt/p7
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* [Bug 16227] Mount command sees partition 2 and partition 7 as same partition
2010-06-16 16:29 [Bug 16227] New: Mount command sees partition 2 and partition 7 as same partition bugzilla-daemon
` (4 preceding siblings ...)
2010-06-17 17:42 ` bugzilla-daemon
@ 2010-06-17 18:11 ` bugzilla-daemon
5 siblings, 0 replies; 7+ messages in thread
From: bugzilla-daemon @ 2010-06-17 18:11 UTC (permalink / raw)
To: linux-ext4
https://bugzilla.kernel.org/show_bug.cgi?id=16227
Eric Sandeen <sandeen@redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|fs_ext3@kernel-bugs.osdl.or |sandeen@redhat.com
|g |
Status|NEW |RESOLVED
Resolution| |INVALID
--- Comment #6 from Eric Sandeen <sandeen@redhat.com> 2010-06-17 17:44:48 ---
You have mounted the same device to 3 different mount points; of course a
change in one will show up on the other. It's the same as a bind mount.
--- Comment #7 from Eugene Blanchard <eugene.blanchard@sait.ca> 2010-06-17 18:11:48 ---
That's a typo here, I was just trying to correct it at the same time that you
responded.
mount /dev/cciss/c0d0p5 /mnt/p5
mount /dev/cciss/c0d0p6 /mnt/p6
mount /dev/cciss/c0d0p7 /mnt/p7
If this was a unique situation then I would agree that it could be pebkac
(problem exists between keyboard and chair) but it's occurred on 3 different
classes of servers: PC, DL320 and DL360.
I've got a spare server that I can bring up and mount the other partitions.
Normally, only one partition is booted to at a time. Post-secondary VoIP lab
each student pair gets there own partition/PBX server to work on.
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