03-15-2013
Quote:
Originally Posted by
verdepollo
Aside form the most common "issues" like a partition being explicitly mounted read-only or a faulty disk array, there's been a widely known bug in RHEL 5 -more specifically in its kernel- where a filesystem might go read-only with no apparent reason.
It has been extensively documented (and fixed) both by RedHat and by VMWare as it mostly affects RHEL servers running under a hypervisor:
https://bugzilla.redhat.com/show_bug.cgi?id=494927
VMware KB: Linux based file systems become read-only
Either upgrade your kernel to a newer version or use the quick and dirty (and temporary) approach of rebooting the machine.
...of course not before trying
mount -o remount <your_filesystem>
Thanks alot for ur ans .. letme try and i will post the results.
---------- Post updated at 12:12 AM ---------- Previous update was at 12:01 AM ----------
one thing more i want to add. that after restarting the system. few more files are being created by both root and non-root automatically. those files are deletable by root.
If the file system is read only. how still these files are being created or i can delete??
Can anyone please tell is it happening due to bug or some other reason stands for it?
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LEARN ABOUT CENTOS
redhat-upgrade-tool
REDHAT-UPGRADE-TOOL(8) redhat-upgrade-tool User Manual REDHAT-UPGRADE-TOOL(8)
NAME
redhat-upgrade-tool - Red Hat Upgrade tool
SYNOPSIS
redhat-upgrade-tool [OPTIONS] SOURCE
DESCRIPTION
redhat-upgrade-tool is the Red Hat Upgrade tool.
The redhat-upgrade-tool client runs on the system to be upgraded. It determines what packages are needed for upgrade and gathers them from
the source(s) given. It also fetches and sets up the boot images needed to run the upgrade and sets up the system to perform the upgrade at
next boot.
The actual upgrade takes place when the system is rebooted, using the boot images set up by redhat-upgrade-tool. The upgrade initrd starts
the existing system (mostly) as normal, lets it mount all the local filesystems, then starts the upgrade.
When the upgrade finishes, it reboots the system into the newly-upgraded OS.
OPTIONS
Optional arguments
-h, --help
Show a help message and exit.
-v, --verbose
Print more info.
-d, --debug
Print lots of debugging info.
--debuglog DEBUGLOG
Write debugging output to the given file. Defaults to /var/log/redhat-upgrade-tool.log.
--reboot
Automatically reboot to start the upgrade when ready.
SOURCE
These options tell redhat-upgrade-tool where to look for the packages and boot images needed to run the upgrade. At least one of these
options is required.
--device [DEV]
Device or mountpoint of mounted install media. If DEV is omitted, redhat-upgrade-tool will scan all currently-mounted removable devices
(USB disks, optical media, etc.)
--iso ISO
Installation image file.
--network VERSION
Online repos matching VERSION (a number or "rawhide")
Multiple sources may be used, if desired.
Additional options for --network
--enablerepo REPOID
Enable one or more repos (wildcards allowed).
--disablerepo REPOID
Disable one or more repos (wildcards allowed).
--addrepo REPOID=[@]URL
Add the repo at URL. Prefix URL with @ to indicate that the URL is a mirrorlist.
--instrepo REPOID
Get upgrader boot images from the repo named REPOID. The repo must contain a valid .treeinfo file which points to the location of
usable kernel and upgrade images.
Cleanup commands
--resetbootloader
Remove any modifications made to bootloader configuration.
--clean
Clean up everything written by redhat-upgrade-tool.
EXAMPLES
redhat-upgrade-tool --network 7.0 --instrepo <repo URL>
Upgrade to RHEL 7.0 by downloading all needed packages and data from the specified repository.
redhat-upgrade-tool --device --network 7.0
Upgrade to RHEL 7.0 using install media mounted somewhere on the system, fetching updates from the network if needed.
EXIT STATUS
0
Success.
1
Cancelled by user, failure writing files to disk, or other unknown error
2
Failed to download/copy files from the given SOURCE
3
RPM upgrade transaction test failed
BUGS
The --iso image must be on a filesystem listed in /etc/fstab.
AUTHORS
Will Woods <wwoods@redhat.com>
redhat-upgrade-tool 11/08/2013 REDHAT-UPGRADE-TOOL(8)