On Mon, Apr 29, 2002 at 06:53:57PM +0100, Stephen C. Tweedie wrote: > Hi, > > On Mon, Apr 29, 2002 at 11:37:30AM -0500, Matt Stegman wrote: > > > Can I use this option to make larger block groups, which should reduce > > fragmentation of my files? > > No, the default is already the maximum, and is limited by the fact > that we require the block allocation bitmap to fit in a single page The only reason why the option is there is because occasionally for debugging purposes I want to make a filesystem with a smaller number of blocks in a block group. This is generally bad from a performance standpoint, but it allows me to create test cases that have a larger number of block groups without taking up quite as much disk space for the test filesystem images. That's why it's not documented; the feature is basically never useful for production filesystems. - Ted
