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From: steve@pmday_2.Dayton.NCR.COM (Steve Bridges)
Newsgroups: comp.unix.questions
Subject: Re: Tape backups and Disk management
Message-ID: <876@pmday_2.Dayton.NCR.COM>
Date: 24 Feb 90 15:05:55 GMT
References: <9782@batcomputer.tn.cornell.edu>
Reply-To: steve@pmday_2.Dayton.NCR.COM (Steve Bridges)
Organization: NCR Corporation - USDPG Product Marketing (Dayton)
Lines: 24

When our file systems get really fragmented, we backup up the file
system with cpio to an 8mm tape drive (it can hold up to 2GB) with
cpio using the following commands, e.g.

	cd /usr/acct
	find . -print | cpio -ocvB > /dev/rmt/64yy

Then after the backup is done

	cd /usr/acct (THIS IS A MOST IMPORTANT STEP)
	rm -r *
	cpio -idmuvcB < /dev/rmt/64yy

This will put it all back on disk, unfragemented.

We use dd quite a lot.  Most of our use of dd is to byte-swap tapes
where the utility that created them stores bytes on the opposite order
of what we expecte them to be in.

-- 
Steve Bridges                    | NCR - USDPG Product Marketing and Support OLS
Steve.Bridges@Dayton.NCR.COM     | Phone:(513)-445-4182 622-4182 (Voice Plus)
..!ncrlnk!usglnk!pmday_2!steve   | AOPA #916233
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