Date: Fri, 7 Feb 2003 21:50:32 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: hackers@FreeBSD.ORG Subject: Re: Resizing file-backed vnode disklabels Message-ID: <20030207215032.GA92670@happy-idiot-talk.infracaninophi> In-Reply-To: <20030207213052.97188.qmail@web12804.mail.yahoo.com> References: <20030207213052.97188.qmail@web12804.mail.yahoo.com>
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On Fri, Feb 07, 2003 at 01:30:52PM -0800, Hans Zaunere wrote: > > Fairly straight forward question I suppose. I'm creating several file-backed > vnode devices on a single physical disklabel to support some jails. If I > start the file at 1gb is it possible to increase the file without losing the > data within it? Would growfs be safe to use? Could I be so bold as to just > tack on 100mb of null chars at the end of the file (I would doubt it, > although it'd be nice). That's doable. You have to re-write the disklabel to correspond to the new size of the backing store, and you need to make sure the fsize, bsize and bps/cpg fields in the disklabel are set to reasonable values in order for growfs(8) to do it's thing. http://www.freebsd.org/cgi/getmsg.cgi?fetch=403393+411791+/usr/local/www/db/text/2002/freebsd-questions/20021006.freebsd-questions Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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