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I have a server with a program which rapidly writes data to a folder. I attached a new disk to the server, mounted it and now I want it to expand or replace the folder with data. The program works with hardcoded folder names and I don't really want to stop it copy the files to new disk and symlink them to address of the old folder.

My original way would be like this:

rsync -avxP --progress /data/oldsrc /mnt/newsrc/
rm -rf /data/oldsrc
ln -s /mnt/newsrc /data/oldsrc

Is there any way to do this without moving/copying old files, removing them from source and linking from new disk to old folder?

Edit: I need all the data in the old folder to be accessible by the program.

  • Can't you unmount /data/oldsrc/and mount /mnt/newsrc instead? – Panki Dec 7 '18 at 9:29
  • @Panki i need all the data inside the old folder accessible. Editing my question. – Mustafa Yılmaz Dec 7 '18 at 9:41
  • Is it an LVM filesystem structure? Kindly post the output of df -Th. – erTugRul Dec 7 '18 at 9:53
  • @erTugRul nah it's an EXT4 drive. /dev/sda3 ext4 309G 286G 6,6G 98% / – Mustafa Yılmaz Dec 7 '18 at 10:20

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