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From: allbery@ncoast.UUCP (Brandon Allbery)
Newsgroups: comp.unix.wizards,comp.unix.questions
Subject: Re: Compressing unix disks
Message-ID: <7508@ncoast.UUCP>
Date: 15 Mar 88 22:09:20 GMT
References: <1071@ndmath.UUCP> <305@marconi.SW.MCC.COM>
Reply-To: allbery@ncoast.UUCP (Brandon Allbery)
Followup-To: comp.unix.wizards
Organization: Cleveland Public Access UN*X, Cleveland, Oh
Lines: 15

As quoted from <305@marconi.SW.MCC.COM> by knutson@marconi.SW.MCC.COM (Jim Knutson):
+---------------
| Dump and restore always worked well in the past for defragmenting a disk.
| The real question is why you would want to do this on a BSD system
| (assuming it is 4.2 or greater).  For AT&T System X, try your favorite
| method of backup and restore (cpio I suppose).
+---------------

Under System V, the way to do it is dcopy:  it defragments the disk, spreads
free blocks evenly over the disk to slow the effect of further fragmentation,
sorts directories to place subdirectories first and thereby speed pathname
accesses, etc.
-- 
	      Brandon S. Allbery, moderator of comp.sources.misc
       {well!hoptoad,uunet!hnsurg3,cbosgd,sun!mandrill}!ncoast!allbery