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Date:      Wed, 8 Feb 1995 18:44:23 +0000 (GMT)
From:      Doug Rabson <dfr@render.com>
To:        hackers@FreeBSD.org
Subject:   MSDOSFS weirdness
Message-ID:  <Pine.BSF.3.91.950208183709.244A-100000@trout.render.com>

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I was just trying to create a large empty file on my DOS partition so 
that I could play with the vn device.  I tried using dd:

	dd if=/dev/zero of=/dos/d/bsdpart bs=20k count=5000

The disk started chugging and the file started growing and all seemed 
fine.  However, when the file reached about 50M, everything stopped.  I 
couldn't kill the dd process but I could login to another vty and the 
system seemed basically fine.  In the ps list, it claimed that dd was 
sleeping in getblk.  I shutdown and rebooted and when reboot tried to 
sync the disks, there was one block which refused to be written for about 
20 tried until it gave up and rebooted anyway.

Is this something obvious to do with the new VM system or is MSDOSFS just 
plain broken?

--
Doug Rabson, RenderMorphics Ltd.	Mail:  dfr@render.com
					Phone: +44 71 251 4411
					FAX:   +44 71 251 0939




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