[CentOS] CentOS on VPS File System in read-only mode

Sat Sep 13 21:46:40 UTC 2014
Pablo Parodi <pablo.parodi at gmail.com>

Hello All,

First of all I want say thanks for all the info I see every time in this
Second, sorry for my basic english.

I writting this because I'm experiencing an issue with a Centos over a VPS.
Every saturday (I have installed this vps since 3 weeks ago) I check the
status of the server I found that the file system is in read-only mode

#touch test
touch: cannot touch `test': Read-only file system

# mount -o remount /
mount: block device /dev/sda1 is write-protected, mounting read-only

Looking for info in the logs, I don't know how to get the root cause of the
issue. But I can see that the last writing process is marked about the 1:40

#ls -ltr - /var/log
-rw------- 1 root     root     479825 Sep 13 01:20 maillog
-rw------- 1 root     root     229268 Sep 13 01:30 cron
-rw------- 1 root     root     106941 Sep 13 01:34 messages

(now is Sep 13 18hr)

The centos is mounted on a VPS. The VPS server is a Proxmox. The sysadmin
of the VPS told me that there is a backup process running on friday at

I suppose that the issue is a very high I/O request on the HD during the
backup process.
( example in vmware

# uname -a
Linux 2.6.18-371.12.1.el5 #1 SMP Wed Sep 3 16:22:34 EDT 2014 x86_64 x86_64
x86_64 GNU/Linux

There is any kind of workarround for this (make the centos more flexible
about the I/O timeouts or fails)
Or maybe there is something to recommend to the VPS sysadmin to solve this

more info:
# more /etc/fstab
LABEL=/                 /                       ext3    defaults        1 1
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
LABEL=SWAP-sda2         swap                    swap    defaults        0 0

#df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1              19G  3.4G   15G  19% /
tmpfs                 502M     0  502M   0% /dev/shm

The previous times it happened the fsck after a reboot fixed the issue.

Thanks in advance.