Arch Linux

TuxLyn

Member

From: United States

Registered: 2011-10-26

Posts: 283

[SOLVED] Partition / is mounted read only

** SOLVED: RE-INSTALLED **

When I run this latest update, I get this error "".

# pacman -Syu
:: Synchronizing package databases...
 glibc-vps is up to date
 core is up to date
 extra is up to date
 community is up to date
:: Starting full system upgrade...
resolving dependencies...
looking for inter-conflicts...

Targets (2): dhcpcd-5.5.6-1  libpng-1.5.10-1

Total Installed Size:   0.95 MiB
Net Upgrade Size:       -0.01 MiB

Proceed with installation? [Y/n]

(2/2) checking package integrity                       [############################] 100%
(2/2) loading package files                            [############################] 100%
(2/2) checking for file conflicts                      [############################] 100%
(2/2) checking available disk space                    [############################] 100%
error: Partition / is mounted read only
error: not enough free disk space
error: failed to commit transaction (not enough free disk space)
Errors occurred, no packages were upgraded.

My fstab

# cat /etc/fstab 
# 
# /etc/fstab: static file system information
#

tmpfs /tmp tmpfs nodev,nosuid,noexec,size=1000M,mode=1777 0 0

devpts /dev/pts devpts defaults 0 0

mounted partitions view:

# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/simfs       50G   11G   40G  22% /
/run            2.0G   36K  2.0G   1% /run
shm             2.0G     0  2.0G   0% /dev/shm

Kernel Version on this OpenVZ/VPS

# uname -r
2.6.18-238.12.1.el5.028stab091.1

Last edited by TuxLyn (2012-12-19 10:05:51)

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Sc00by22

Member

Registered: 2012-01-24

Posts: 3

Re: [SOLVED] Partition / is mounted read only

I'm getting the same error as you:

:: Synchronising package databases...
glibc-vps is up to date
core                     103.5 KiB   924K/s 00:00 [######################] 100%
extra                   1384.4 KiB  2.21M/s 00:01 [######################] 100%
community               1652.1 KiB  2.30M/s 00:01 [######################] 100%
:: Starting full system upgrade...
resolving dependencies...
looking for inter-conflicts...

Targets (3): dhcpcd-5.5.6-1  libpng-1.5.10-1  tzdata-2012c-1

Total Download Size:    0.43 MiB
Total Installed Size:   6.36 MiB
Net Upgrade Size:       -0.24 MiB

Proceed with installation? [Y/n] y
:: Retrieving packages from core...
dhcpcd-5.5.6-1-i686       67.2 KiB   676K/s 00:00 [######################] 100%
tzdata-2012c-1-any       132.9 KiB   871K/s 00:00 [######################] 100%
:: Retrieving packages from extra...
libpng-1.5.10-1-i686     237.6 KiB  1391K/s 00:00 [######################] 100%
(3/3) checking package integrity                   [######################] 100%
(3/3) loading package files                        [######################] 100%
(3/3) checking for file conflicts                  [######################] 100%
(3/3) checking available disk space                [######################] 100%
error: Partition / is mounted read only
error: not enough free disk space
error: failed to commit transaction (not enough free disk space)
Errors occurred, no packages were upgraded.

#
# /etc/fstab: static file system information
#
# <file system> <dir>   <type>  <options>       <dump>  <pass>
tmpfs           /tmp    tmpfs   nodev,nosuid    0       0
none    /dev/pts    devpts    defaults    0    0

Filesystem      Size  Used Avail Use% Mounted on
/dev/simfs       20G  4.3G   16G  22% /
/run            512M   40K  512M   1% /run
shm             512M     0  512M   0% /dev/shm
tmpfs           512M     0  512M   0% /tmp

2.6.18-274.18.1.el5.028stab098.1

Last edited by Sc00by22 (2012-04-05 20:19:34)

Stebalien

Member

Registered: 2010-04-27

Posts: 1,237

Website

Re: [SOLVED] Partition / is mounted read only

That is because initscripts no longer manually remounts '/' as read-write to allow for read-only root partitions. You need to put an entry for '/' in /etc/fstab. See the wiki for examples: https://wiki.archlinux.org/index.php/Fstab

Last edited by Stebalien (2012-04-05 20:33:34)

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loafer

Member

From: the pub

Registered: 2009-04-14

Posts: 1,772

Re: [SOLVED] Partition / is mounted read only

You do not seem to have any fstab entries for "/".

edit: Stebalien beat me.

Last edited by loafer (2012-04-05 20:35:05)

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Sc00by22

Member

Registered: 2012-01-24

Posts: 3

Re: [SOLVED] Partition / is mounted read only

I can't say I have any experience with fstab, I've tried using this below with no success.

tmpfs           /tmp    tmpfs   nodev,nosuid,noexec 0 0
/dev/simfs      /       simfs   defaults,noatime 0 1
none    /dev/pts    devpts    defaults    0    0

Stebalien

Member

Registered: 2010-04-27

Posts: 1,237

Website

Re: [SOLVED] Partition / is mounted read only

My guess would be to change 'defaults,noatime' to 'defaults,noatime,rw' but that shouldn't be necessary and I have no experience with simfs. Also, the oldest supported kernel version on Arch is 3.0.26. Your older kernel may have problems with Arch's udev.
Also, what packages did you last successfully update (look in /var/log/pacman.log).

Last edited by Stebalien (2012-04-06 02:58:54)

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TuxLyn

Member

From: United States

Registered: 2011-10-26

Posts: 283

Re: [SOLVED] Partition / is mounted read only

]# pacman -Syu
:: Synchronizing package databases...
 glibc-vps is up to date
 core                         103.5 KiB   887K/s 00:00 [############################] 100%
 extra                       1384.6 KiB  1041K/s 00:01 [############################] 100%
 community                   1651.4 KiB   664K/s 00:02 [############################] 100%
:: Starting full system upgrade...
resolving dependencies...
warning: dependency cycle detected:
warning: util-linux will be installed before its udev dependency
looking for inter-conflicts...

Targets (8): dhcpcd-5.5.6-1  filesystem-2012.2-4  kmod-7-2  libpng-1.5.10-1
             syslog-ng-3.3.4-5  tzdata-2012c-1  udev-181-9  util-linux-2.21.1-2

Total Download Size:    2.13 MiB
Total Installed Size:   17.29 MiB
Net Upgrade Size:       -0.35 MiB

Proceed with installation? [Y/n] 
:: Retrieving packages from core...
 filesystem-2012.2-4-any        4.0 KiB  1784K/s 00:00 [############################] 100%
 kmod-7-2-i686                 78.7 KiB   166K/s 00:00 [############################] 100%
 syslog-ng-3.3.4-5-i686       341.9 KiB   445K/s 00:01 [############################] 100%
 tzdata-2012c-1-any           132.9 KiB   191K/s 00:01 [############################] 100%
 util-linux-2.21.1-2-i686    1414.8 KiB   923K/s 00:02 [############################] 100%
 udev-181-9-i686              213.4 KiB   709K/s 00:00 [############################] 100%
(8/8) checking package integrity                       [############################] 100%
(8/8) loading package files                            [############################] 100%
(8/8) checking for file conflicts                      [############################] 100%
(8/8) checking available disk space                    [############################] 100%
error: Partition / is mounted read only
error: not enough free disk space
error: failed to commit transaction (not enough free disk space)
Errors occurred, no packages were upgraded.

Last edited by TuxLyn (2012-04-06 06:11:53)

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TuxLyn

Member

From: United States

Registered: 2011-10-26

Posts: 283

Re: [SOLVED] Partition / is mounted read only

It might be the fact that my VPS hosting oversold and now the node is full. I've contacted them now to see what is going on.

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allblue.z

Member

Registered: 2012-03-20

Posts: 1

Re: [SOLVED] Partition / is mounted read only

I got this error and solved it.I guess your vps is openvz? the latest glibc package from http://dev.archlinux.org/~ibiru/openvz/glibc-vps is 2.15-103,when I downgrade to 102,the error gone.your glibc is broken,so you should do like this.

download the 102 package and tar to root filesystem

tar -xJvf glibc-2.15-102-i686.pkg.tar.xz  -C /

Last edited by allblue.z (2012-04-06 13:15:46)

alphaniner

Member

From: Ancapistan

Registered: 2010-07-12

Posts: 2,810

Re: [SOLVED] Partition / is mounted read only

mounted partitions view:

# df -h
...

Strictly speaking, df is not for viewing mounted partitions.  Use mount for that:

$ mount
...
/dev/mapper/VG0-lv_root on / type ext4 (rw,noatime,user_xattr,barrier=1,data=ordered)
...
/dev/sda2 on /boot type ext2 (rw,noatime,user_xattr,barrier=1)
/dev/mapper/VG0-lv_home on /home type reiserfs (rw,noatime)
/dev/mapper/VG0-lv_var on /var type reiserfs (rw,noatime)
...

Note that mount options are displayed for each partition.

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Sc00by22

Member

Registered: 2012-01-24

Posts: 3

Re: [SOLVED] Partition / is mounted read only

I got this error and solved it.I guess your vps is openvz? the latest glibc package from http://dev.archlinux.org/~ibiru/openvz/glibc-vps is 2.15-103,when I downgrade to 102,the error gone.your glibc is broken,so you should do like this.

download the 102 package and tar to root filesystem

tar -xJvf glibc-2.15-102-i686.pkg.tar.xz  -C /

I was about to say that the only package I updated last time was glibc, I guess being on an OpenVZ VPS is not want I want to be doing in the future with Arch. It would probably be better to do pacman -U glibc-2.15-102-i686.pkg.tar.xz though.

Last edited by Sc00by22 (2012-04-07 21:14:40)

horsedrowner

Member

Registered: 2012-04-17

Posts: 1

Re: [SOLVED] Partition / is mounted read only

I'm getting the same problem. My details are pretty much the same as in the OP; mount shows the following:

$ mount
/dev/simfs on / type simfs (rw,relatime,usrquota,grpquota)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
run on /run type tmpfs (rw,nosuid,nodev,relatime)
shm on /dev/shm type tmpfs (rw,nosuid,nodev,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,relatime)
none on /dev/pts type devpts (rw,relatime)

As you can see, / is mounted rw.

The last package upgraded as shown in /var/log/pacman.log is glibc.

I try what allblue.z wrote, but tar complains I can't use multi-volume compressed archives, and -M doesn't help.
Using pacman -U glibc-2.15-102-i686.pkg.tar.xz also gives the "parition / is mounted read only" error, so that doesn't work either.

Any help would be appreciated. Let me know if more details are needed.

DSpider

Member

From: Romania

Registered: 2009-08-23

Posts: 2,273

Re: [SOLVED] Partition / is mounted read only

I gotta ask, WTF is "simfs" and why are you guys mounting it as a type ?

Here's my fstab:

# <file system>                                 <dir>           <type>  <options>                            <dump>  <pass>

tmpfs                                           /tmp            tmpfs   nodev,nosuid,noexec                     0       0

UUID=978e3e81-8048-4ae1-8a06-aa727458e8ff       /               ext4    defaults,noatime                        0       1
UUID=f838b24e-3a66-4d02-86f4-a2e73e454336       /media/Storage  ext4    defaults,noatime,nodev,nosuid,noexec    0       0
UUID=14d50a6c-e083-42f2-b9c4-bc8bae38d274       /media/Backup   ext4    defaults,noatime,nodev,nosuid,noexec    0       0

And mount:

$ mount

proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
sys on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
/dev on /dev type devtmpfs (rw,nosuid,relatime,size=902592k,nr_inodes=219966,mode=755)
run on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
/dev/sdb1 on / type ext4 (rw,noatime,user_xattr,acl,barrier=1,data=ordered)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
shm on /dev/shm type tmpfs (rw,nosuid,nodev,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime)
/dev/sdb3 on /media/Storage type ext4 (rw,nosuid,nodev,noexec,noatime,user_xattr,acl,barrier=1,data=ordered)
/dev/sda2 on /media/Backup type ext4 (rw,nosuid,nodev,noexec,noatime,user_xattr,acl,barrier=1,data=ordered)
gvfs-fuse-daemon on /home/dspider/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,relatime,user_id=1000,group_id=100)

Everything is working fine.

Where are you guys getting your information from on how to set up your /etc/fstab ? There's a fricken wiki article on fstab right here: https://wiki.archlinux.org/index.php/Fstab

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Gcool

Member

Registered: 2011-08-16

Posts: 1,456

Re: [SOLVED] Partition / is mounted read only

I gotta ask, WTF is "simfs" and why are you guys mounting it as a type ?

They're running Arch on a VPS (OpenVZ I'm guessing). simfs is a sort of virtual filesystem used by that software.

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Ashren

Member

From: Denmark

Registered: 2007-06-13

Posts: 1,229

Website

Re: [SOLVED] Partition / is mounted read only

This may be due not having the "fsck" hook defined in mkinitcpio.conf.

https://wiki.archlinux.org/index.php/Mkinitcpio#HOOKS

You would need regenerate your initial ramdisk with "mkinitcpio -p linux" from a livecd. I assume it is possible to boot your VPS from a rescue cd.

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ruurdkrekt

Member

Registered: 2010-03-14

Posts: 32

Re: [SOLVED] Partition / is mounted read only

I am experiencing the same problem as described by TuxLyn when I want to install any package or a full system upgrade.
The mount command does show that the filesystem has been mounted as rw and I am still able to make changes to configuration files as well.

The problems started happening after I did upgrade the system, however I did check the pacman.log and with me the glibc is not updated last.
When I did execute this system upgrade, pacman did came with a warning saying:

resolving dependencies...
looking for inter-conflicts...
error: failed to prepare transaction (could not satisfy dependencies)
:: gcc: requires gcc-libs=4.7.0-3

I then manually first upgraded all the dependencies before continuing with the system upgrade, could this have affected anything?

ruurdkrekt

Member

Registered: 2010-03-14

Posts: 32

Re: [SOLVED] Partition / is mounted read only

I got this error and solved it.I guess your vps is openvz? the latest glibc package from http://dev.archlinux.org/~ibiru/openvz/glibc-vps is 2.15-103,when I downgrade to 102,the error gone.your glibc is broken,so you should do like this.

download the 102 package and tar to root filesystem

tar -xJvf glibc-2.15-102-i686.pkg.tar.xz  -C /

Solved my problem

z0id

Member

From: Romania

Registered: 2010-02-02

Posts: 122

Re: [SOLVED] Partition / is mounted read only

For anyone still having this problem, you can comment CheckSpace in pacman.conf, but keep an eye on the free space.

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luceo

Member

From: Europe

Registered: 2012-05-02

Posts: 20

Website

Re: [SOLVED] Partition / is mounted read only

I got this error and solved it.I guess your vps is openvz? the latest glibc package from http://dev.archlinux.org/~ibiru/openvz/glibc-vps is 2.15-103,when I downgrade to 102,the error gone.your glibc is broken,so you should do like this.

download the 102 package and tar to root filesystem

tar -xJvf glibc-2.15-102-i686.pkg.tar.xz  -C /

How are you un-taring something on a read-only filesystem?

grando

Member

Registered: 2012-09-01

Posts: 1

Re: [SOLVED] Partition / is mounted read only

I got this error and solved it.I guess your vps is openvz? the latest glibc package from http://dev.archlinux.org/~ibiru/openvz/glibc-vps is 2.15-103,when I downgrade to 102,the error gone.your glibc is broken,so you should do like this.

download the 102 package and tar to root filesystem

tar -xJvf glibc-2.15-102-i686.pkg.tar.xz  -C /

Solved my problem

Solved my problem, too What I did was downgrade from glibc-2.16.0-101 to glibc-2.16.0-100

vostok4

Member

Registered: 2010-12-16

Posts: 70

Re: [SOLVED] Partition / is mounted read only

Yeah, had the same problem and it was solved here by downgrading from -101 to -100 this time. Wonder why this happens, -100 worked fine for me.

rds100

Member

Registered: 2012-10-16

Posts: 1

Re: [SOLVED] Partition / is mounted read only

The problem is caused by incompatibility between the glibc and the OpenVZ kernel.

In the arch kernel an f_flags field was added in the struct statfs returned by the statfs64 system call. Unfortunately the OpenVZ kernel doesn't know about the f_flags field so it just returns random garbage at
what it sees to be the end of the structure. And then glibc (and hence libalpm and pacman) interprets this
random garbage as file system flags and thinks the root file system is mounted read only. So pacman refuses to install any package (pacman -S package fails with filesystem is read only).

Ultimately the bug lies in the glibc package from the glibc-vps repository.

I have made an ugly workaround for this - i LD_PRELOAD my own small shared library before calling pacman, it intercepts the statvfs64() call and fixes the bogus f_flags field on return - this makes pacman work. But it is not the proper solution to the problem. The proper solution would be to fix the glibc package to not rely on f_flags in struct statfs.