Ubuntu Server Guide

EXT2 (second extended) file system is an advanced file system for Linux kernel. This is the replacement of external file system. It is possible to resize the ext2 file system, while mounted, and the system it uses. It is possible to use ext2online utility. The process of resizing the file system while applications are open files and write data to a file system is fine. However, you should always have complete and valid backup of critical data before installing or online file system mounted. In case something goes wrong, you may encounter serious data loss situation, which requires the Linux data recovery to be fixed.

You can resize only mount Ext2 file system. To use ext2online utility, you must have online support for ext2 size (CONFIG_EXT2_RESIZE) be enabled on your Linux Kernel. You can enable this feature after applying the appropriate patch for the 2.x series kernel.

File system, which is specified by the device, or Mountpoint must be mounted immediately. By default, the mounted file system is increased to fill the device. If you specify an additional parameter size, and then use it instead of a certain size. If the optional modifier is not available, it is taken from Ext2 file system blocks.