General :: Server Filesystem Enters Read Only Mode Automatically?

Nov 28, 2010

I am running a dedicated server with linux cent os 5.5 32 bit with lighttpd, php 5.2.14 and mysql

I am getting problem in my server. The filesystem enters read only mode automatically and then I can't edit any file in my server. This happens by itself. I tried to run fsck command and it gives the following output:

Code:
[root@server]# fsck -A -y
fsck 1.39 (29-May-2006)
e2fsck 1.39 (29-May-2006)
/: recovering journal
Clearing orphaned inode 11108656 (uid=0, gid=0, mode=0140777, size=0)
Clearing orphaned inode 13631499 (uid=27, gid=27, mode=0100600, size=0)

[Code]....

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General :: External Drive Read Only - WARNING! Running E2fsck On A Mounted Filesystem May Cause SEVERE Filesystem Damage

Mar 24, 2010

I've had a look at some similar threads but as I'm very new to linux they're already a bit technical for me. Sorry, this calls for someone with patience. I gather from other threads that disconnecting an external drive without unmounting is a no-no, and this seems to be the likely cause. Now the disk is read only and I'm unable to change any settings through the usual control panel on ubuntu. I'm just not familiar with the terminal instructions. I tried to cut and past a few command lines from other threads but I got some warnings that proceding could damage data. Like this one: WARNING! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage.

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I'm running CentOS 4.3 on a VM which is an application server for Quinstreet. trouble is when i keep coming in during the mornings it seems to keep making this root filesystem read only. There is no pattern for this and neither is it clear in the messages log why this keeps happening.

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General :: How To Write To A Read-only Filesystem

Feb 19, 2011

I have been given a headless linux system running from a SD card. I get into it by putty, directly to root, not other user and even /home dir. Whatever I copy or write will dissapear because is ro.

my etc/fstab file is:

none /dev/pts devpts gid=5,mode=620 0 0
none /proc proc defaults 0 0
none /dev/shm tmpfs defaults 0 0
/dev/hda1 /boot vfatnoauto,rw 0 0

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Server :: Server Change Into Read-only Mode ?

Jul 14, 2011

I've a popular vbulletin forum (10k max in vbulletin stats 'whos online') runnin in two servers like this:

1) Web server running vBulletin.
Dual Intel E5620 @ 2.40GHz (shows 16 cpus)
12 GB RAM
2 x 500 GB SATA (one for system/web and other for backups)
CentOS 5.6 64 bit
Apache/2.2.17
PHP 5.2.16

2) MySQL 5.server
Dual Intel E5620 @ 2.40GHz (shows 16 cpus)
16 GB RAM
2 x 500 GB SATA (one for system/web and other for backups)
CentOS 5.6 64 bit
MySQL 5.0.77

Web server connects to MySQL using private LAN.
Web-php server works with xcache as recommended by vBulletin.
Image/avatars and other static files (css, js, etc) are on a CDN
MySQL server uses Memcached for caching common queries.

The problem I'm facing, is from time to time (let's say one or two times a week) the Web server goes into read only mode... then the server has to be rebooted in order to get online normally and be able to work. From the logs I've seen this:

Code:

This is a new server, and in the old server the 'read only mode' issue happened very often too... so I guess it's not a HD issue.. it's just the HD have a heavy I/O usage. What do you think?

I am thinking about this solutions to improve the webserver performance:

1) 75% of the vbulletin users are anonymous users, so I've been thinking about using Cloudflare as a cache for all that traffic, that would reduce the php-webserver process a lot.

2) Using an external email server is a good option I guess... as right now the webservers also handles the email notifications for all the vbulletin users and it is constantly sending email everywhere. So, email will be stopped to gain server performance.

3) Mounting partitions with 'noatime' at /etc/fstab seems to improve I/O performance.

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General :: Script To Check If A Filesystem Is Read-only?

Jul 6, 2010

write a script that will check all filesystems to see if they are read-only.

I have come up with ...

df -h > /tmp/mount.lst
awk '{print $6}' /tmp/mount.lst > /tmp/mounted_systems.lst

This gives me ..

Mounted
/
/boot
/dev/shm
/proc

So now I have ..

How do I automatically get rid of the 'Mounted' header in my /tmp/mounted_systems.lst file ?

Also, I don't want to check the /proc filesystem, so how do I remove that within the script too.

Then I will run ...

while read dir
do
touch $dir/read_only_test
done < /tmp/mounted_systems.lst

If the filesystem is read only, I want that filesystem name to be listed into another file.

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Sep 24, 2010

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ote: even though the thread is marked as SOLVED, the issue is actually not. I have managed to dual-boot Win7 and Ubuntu, but with partition configuration changes

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Jan 19, 2011

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Aug 23, 2010

I am using ubuntu 10.04.My samsung e2120 has external micro sd card of 2GB.When i connect mobile to computer via cable in windows , it works normal as USB mass storage as configured by me in mobile settings.But in case of ubuntu 10.04

Code:
$cp /data/to send/khatarnak shayri.txt /media/E0FD-1813/
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[code].....

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General :: RW Permissions On External HDD - Chmod: Changing Permissions Of `whatever': Read-only Filesystem

Mar 15, 2010

I have a problem with my external hdd, I mounted it manually and in the mount table it says ive got rw permissions. But when i try to change permissions it says:

chmod: changing permissions of `whatever': read-only filesystem.

This is my mount table:

[root@localhost ExtHDD]# mount
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none on /proc type proc (rw)
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[code]....

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General :: Remount Root Filesystem As Read/write After Modify Readonly-root File?

Dec 21, 2010

My linux distro is CentOS 5.3. Today I edited /etc/sysconfig/readonly-root and set "READONLY" to yes, now my /etc/sysconfig/readonly-root file is like this:

# Set to 'yes' to mount the system filesystems read-only.
READONLY=yes
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[code]...

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OpenSUSE :: Filesystem Has Become Read-only?

Aug 1, 2010

openSuse v9.3 (Yes, it's old)linux 2.6.11.4-21.17-smp i686At some time after July 28 the entire filesystem has become read-only. It was functional on July 28, the last time I logged into the machine and edited a file. Even as the superuser when I attempt to change, say, the permissions of a file, I get:

Code:
> # chmod 777 /opt
chmod: changing permissions of `/opt': Read-only file system

[code].....

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I have 64bit install with CentOS release 5.3 (Final)It's been stable for about six months. What happened a while ago is really weird, I haven't messed with anything lately but the entire /home filesystem became read-only. Can't write, can't delete to anything on /home. The other filesystems are fine. I am root, and the permissions look normal. My directories and files are writable and readable.

root@atlanta [/home]# touch foo.txt
touch: cannot touch `foo.txt': Read-only file system
root@atlanta [/home]# ls -l

[code]....

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How can i read out the superblock of a filesystem?

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Is this really the way to go about this? If so do I simply make a live cd iso and edit the files within to handle mounting a rw hard drive and linking data and configuration files to that drive? I've considered just leaving all the data on the physical hard disk and mounting it as ro on boot for binaries and such but can't that just be changed with the right permissions?

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Yesterday I post this note, because I've an urgent issue with the filesystem in opensuse 11.4, used like VMWare guest OS, over VMware Server 2 for w2k3 64bit like a host) opensuse 11.4 Filesystem goes read-only in VMware

But, Novell have a fix published for SLES 10, with the 2.6.16.46-0.12 kernel version .

I'm using a Opensuse 11.4 with the 2.6.37.6-0.5-desktop kernel version. May be related with the LSI virtual scsi hardware?

Because exists a fix for SLES 9, 10, RedHat EL 4,5 and Ubuntu 7.10, but doesn't work in opensuse 11.4

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May 25, 2010

I have double boot (windows7 and Opensuse) on my laptop.

My problem is when try to login Opensuse says Read only file system.(While booting a lot of things FAILS(written red) because of Read only file system). So i can't login.

Cause of this problem is want to reach my Opensuse filesystem from windows7.I installed Ext2fsd software to windows7.After installed software can see my opensuse filesystem.But it looks empty from windows7.So uninstalled the software.

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I can't use any command beceause can't login. (I will try to boot with Opensuse Dvd)

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Aug 22, 2011

I'm a issue with a opensuse 11.4 guest VM. The root partition goes read-only while the VM was running normally.

I note this /var/log/messages:

Code:
Aug 22 10:57:02 guest1 kernel: [508161.475307] mptscsih: ioc0: attempting task abort! (sc=dc29c5c0)
Aug 22 10:57:02 guest1 kernel: [508161.475380] sd 2:0:0:0: [sda] CDB: Write(10):
Aug 22 10:57:02 guest1 kernel: [508161.475582] mptscsih: ioc0: task abort: SUCCESS

[Code]....

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Mar 11, 2011

I am installing Ubuntu 9.04 Desktop on my system. using entire disk. my disk is new one. first time i installed ubuntu on it successfully, used it and installed new kernel and some upgrades. all were successful.but on installing some drivers, its files system corrupted. so I had the need to re-install the OS again. NOW , when i am installing the OS, it gives error "(Errno 30] Read only filesystem" explaining that either CD/DVD is corrupt or HDD is corrupt. temperature of the environment may be high. I changed the system , ehanged the environment, moved to some cool place, changed CD drive and CD (after making new one from ISO), changed the HDD but all useless, error is there,

while installation is in progress my sda1 is mount on /target. when i see fstab, here in the line of /dev/sda1 ,error=remount-ro is observed. sometime installation gives error no 5 sometimes it gives error no 30 but both the errors convey almost same message explaining that either HDD is corrupt or CD. As i have explained that I changed every thing including HDD and CD but the error is same.

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Aug 18, 2011

I want to install 11.04 next to my working 10.04 system. First I need to make room for the new system so I have booted from a live cd and started GParted. In GParted the partition with the 10.04 system on it, /dev/sda1, has a red circle with an exclamation mark in it and I cannot resize it. When I doubleclick on /dev/sda1 there is the following warning

Quote:

Failed to change to directory '.'(Stale NFS file handle)
Failed to change to directory '.'(Stale NFS file handle)
Unable to read the contents of this file system!
Because of this some operations may be unavailable.

The following list of software packages is required for ext4 file system support: e2fsprogs v1.41+.

The 10.04 system is working and has worked like a dream for a couple of years and the machine has never had any other system on it. Why would the live CD not be able to read ext4 fs?

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Aug 30, 2010

Below is a print out of my partition Table from Fdisk, in Cylinder mode, Sector mode, and then in expert mode?

Why in expert mode does it look like Partitions 2 and 3 share the same sector / hd / Cylinders? Is this OK?

Code:

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Jul 3, 2010

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