Understanding the folder structure

• The archive space is located at /MRIArchive. It' folder structure has been organized similarly to the /MRIWork space.

  For example:

  The data in folder /MRIWork/MRIWork10/pv/<user_folder>/Old/ should be compressed and archived in /MRIArchive/MRIWork10/pv/<user_folder>/Old.tar.gz location as a compressed tarball gzip file. Individuals will have writing permissions to their respective archive folders.

How to compress the data and archive it

• Use the tar cvf and gzip -9 commands to achieve highest compression.

  For example:

      tar cvf - /MRIWork/MRIWork10/pv/<user_folder>/Old/ | gzip -9 -> /MRIArchive/MRIWork10/pv/<user_folder>/Old.tar.gz

Check if the backup has worked

• use the /usr/local/apps/psycapps/Archive_Old_Workspace/Check_Backup_Content.sh script to check whether the backed-up content is same as the original. It is done with the help of file identifiers called md5sums. The script takes 2 inputs (input 1 -> path to the original folder, input 2 -> path to the Tarball archive) and produces a report. For example:

   bash /usr/local/apps/Archive_Old_Workspace/Check_Backup_Content.sh /MRIWork/MRIWork10/pv/<user_folder>/Old/ /MRIArchive/MRIWork10/pv/<user_folder>/Old.tar.gz

• check the Backup Report files thus created in /tmp/Backup_Report-XXXXXXXXXX/ to check if you have successfully retrieved your backed up data.

Delete the original folder

• Please do not forget to remove your original folder. It would not work if you delete it from the GUI, it will just go and sit in the Trash. Use rm -r command for the removal of the directory. Be careful, this above process is non-reversible. Please double check if you have got the backup file properly. One simple way to do this is to check the size of the backup file with the du command.

For example:

    du -sh /MRIArchive/MRIWork10/pv/<user_folder>/Old.tar.gz

Once you are confident remove the folder like:

    rm -r /MRIWork/MRIWork10/pv/<user_folder>/Old/

Retrieving the backup

• change directory to where you want to retrieve your backup. Use the tar xzf command to extract it.

For example:

    cd /MRIWork/MRI-Scratch
    tar xzf /MRIArchive/MRIWork10/pv/<user_folder>/Old.tar.gz