Date: Wed, 30 Jul 2003 09:14:25 +0400 (MSD) From: Dmitry Morozovsky <marck@rinet.ru> To: Joshua Oreman <oremanj@www.get-linux.org> Cc: hackers@freebsd.org Subject: sparse files from shell [Re: file size different from ls to du] Message-ID: <20030730090934.L90518@woozle.rinet.ru> In-Reply-To: <20030729160048.GA4647@webserver> References: <200307291524.h6TFO3J06998@revolt.poohsticks.org> <20030729160048.GA4647@webserver>
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On Tue, 29 Jul 2003, Joshua Oreman wrote:
[snip]
JO> Usually programs will manage their own sparse files; it's something hard
JO> to do at the shell.
dd is your friend.
These commands make sparse file of some ks physical and 1g logical:
VNFILE=/tmp/sparsefile
VNSZ=$((1024*1024))
dd if=/dev/zero of=${VNFILE} bs=1k count=1 seek=$((${VNSZ} - 1))
Sincerely,
D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
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