Date: Sun, 24 Jun 2007 14:57:22 -0700 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: Morgan Reed <morgan.s.reed@gmail.com> Cc: stable@freebsd.org Subject: Re: PXE booting issues Message-ID: <20070624215722.GA15392@eos.sc1.parodius.com> In-Reply-To: <b024b3480706240427k2433f709me6c8b770a1d46cc@mail.gmail.com> References: <b024b3480706240427k2433f709me6c8b770a1d46cc@mail.gmail.com>
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On Sun, Jun 24, 2007 at 09:27:42PM +1000, Morgan Reed wrote: > ============== > dd if=pxeboot.tmp of=pxeboot obs=2k conv=osync > 425+0 records in > 107+0 records out > ============== > The discrepancy in the records in and the records out is concerning > but I would expect the file to exist regardless, I'm currently using > the default /boot/pxeboot. The default blocksize in dd is 512 -- that is, ibs=512 and obs=512. If you only specify obs, ibs still remains at 512. 2048 / 512 = 4. 107 * 4 == 428, which is about 425; chances are the file isn't *exactly* on a 2047-byte boundary, which explains the "missing 3". If you do "bs=2k", you should see both 107 records in and out. I hope this helps clear up any concern over that part. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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