Quantum 6-01658-05 manual Making or Unmaking a File System on, Defragmenting a Disk

				Chapter 6 Managing the File System
				Working With Disks
			Caution: Deleting a disk used in a stripe group results in a complete
				loss of user data and requires re-making the file system.
				For information on re-making the file system, refer to
				Making or Unmaking a File System on page 105.
	1			From the SNFS home page, choose Disks from the Config menu. The
				Manage Disks screen (figure 67) appears.
	2			Select from the File Systems drop-down menu the file system that
				contains the disk you want to delete.
	3			Select from the Disks list the disk you want to delete.
	4			Click Delete. A message asks you to confirm that you want to delete
				the disk.
	5			Click OK to proceed with the deletion. The Delete Disk status screen
				appears.
	6			After the status screen indicates that the disk has been deleted, click
				Close.
		This procedure describes how to defragment a disk using the
Defragmenting a Disk
		snfsdefrag utility to relocate SNFS file data into a single, pre-allocated
		extent. Reducing the number of extents in a file improves system
		performance by minimizing disk head movement when I/O occurs. You
		can defragment a single file or multiple files, perform a recursive
		defragment on files in a directory, or defragment the entire file system.
	1			Log onto a metadata controller as root. The metadata controller is the
				computer where the StorNext server (not the client) is installed.
	2			Do one of the following:
				• To defragment a single file or a list of files, type:

/usr/cvfs/bin/snfsdefrag <filename> [filename ....]

• To perform a recursive defragment on files in a directory, type: /usr/cvfs/bin/snfsdefrag -r <directory_name>

If the directory_name value is equal to the mount point, then the entire StorNext file system is defragmented.

StorNext User’s Guide 112