How to perform file system check


Sometimes you face the issue in which you are getting the error 'Read_only' for your drive. In such case, you need to perform file system check for the specific drive having error using the "fsck" command:

You can use the command below to perform fsck.

===========
# fsck -Cy /dev/sdaX - replace X with the partition number

-C : Displays completion/progress bars
-y : Cause the fsck to always attempt to fix any detected filesystem corruption
automatically (Assume "yes" to all questions)
============

Example:

# umount /dev/sdb
# fsck -Cy /dev/sdb
# mount /dev/sdb /backup

While trying to unmount the drive "Device busy" message was shown. You need to identify the process & kill that process like this:

# fuser -m /dev/sdb
/dev/sdb:            24519c      

# ps ax | grep 24519
24519 ?        DN     0:29 /usr/bin/updatedb -f
sysfs?rootfs?bdev?proc?cpuset?binfmt_misc?debugfs?securityfs?sockfs?usbfs?pipefs?anon_inodefs?futexfs?tmpfs?inotifyfs?eventpollfs?devpts?ramfs?hugetlbfs?mqueue?autofs

#kill -9 24519

Then umount.

Thank you.

Comments

Post a Comment

Popular posts from this blog

SVN: File remains in conflict

This error occurs when you didn't update the SVN and try to commit changes or, someone has made changes to this file that are conflicting with your changes. There are two ways to handle this situation. Either, you can revert back the changes you want to commit and then, update the SVN and after that make the changes again and commit. The other way is, you need to resolve the conflicted files one by one. You can keep all the conflicted files in a folder and resolved it at once. >> Revert the changes steps: svn revert . -R svn up >> Resolve the conflicted files: svn resolved <file_name>
Read more

12 tweakings for WHM/cPanel to speed up WordPress

   1. Turning Mailman off – WHM >> Server Configuration >>  Tweak Settings and turning it off    2. Number of minutes between mail server queue runs (default is 60) – Setting it 120    3. Default catch-all/default address behavior for new accounts” to fail    4. Boxtrapper Spam Trap and SpamAssassin Spam Box delivery – off    5. Analog Stats – off    6. Conserve Memory at the expense of using more cpu/diskio – turn on    7. WHM >> Service Configuration >> FTP Server Configuration – Check ‘no’ to ‘allow anonymous logins and ‘no’ to ‘anonymous uploads’    8. WHM >> cPanel >> Manage Plugins – install spamdconf – then go to ‘Setup Spamd Startup Configuration’ – select option 2 ‘Maximum Children” to 2′    9. Run your cron jobs at off peak hours.   10. Install e Accelerator PHP accelerator (Recompile Apache with eAccelerator)   11. Compiling Apache with mod_deflate Gzip Module   12. Running Apache with the thread-based “Worker” MPM
Read more

HowTo: Enable extended logging for exim

When troubleshooting mail or attempting to discover the source of spam originating from your server, it is often useful to enable extended Exim logging. You can enable extended logging for exim though your shell prompt as well as through WHM interface. I am giving the steps for both ways one by one: 1. Through shell prompt: 1. Open exim.conf 2) Find this: hostlist auth_relay_hosts = * 3) After hostlist auth_relay_hosts = * add the following: log_selector = +address_rewrite +all_parents +arguments +connection_reject +delay_delivery +delivery_size +dnslist_defer +incoming_interface +incoming_port +lost_incoming_connection +queue_run +received_sender +received_recipients +retry_defer +sender_on_delivery +size_reject +skip_delivery +smtp_confirmation +smtp_connection +smtp_protocol_error +smtp_syntax_error +subject +tls_cipher +tls_peerdn 4) The final result should look like this hostlist auth_relay_hosts = * log_selector = +address_rewrite +all_parents +arguments +connecti
Read more