Date: Thu, 16 Apr 2009 13:27:46 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: Damian Gerow <dgerow@afflictions.org> Subject: Re: ZFS checksum errors on umass(4) insertion Message-ID: <200904161327.46509.jhb@freebsd.org> In-Reply-To: <20090416161851.GC1605@plebeian.afflictions.org> References: <49BD117B.2080706@163.com> <200904161145.38687.jhb@freebsd.org> <20090416161851.GC1605@plebeian.afflictions.org>
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On Thursday 16 April 2009 12:18:51 pm Damian Gerow wrote: > John Baldwin wrote: > : > I'm at a bit of a loss as to what to test next, other than checking for an > : > increased number of checksum errors after unloading umass. However, I'm not > : > convinced this is going to highlight the actual problem. I'm all ears as to > : > what to test for at this point, as I'm running out of ideas. > : > > : > A little less wordy: help? > : > : Do your umass(4) drives use ZFS or some other filesystem? > > Something in the FAT line, likely FAT32. I use ZFS for everything but my > root filesystem (/usr, /var, /tmp, /home, and a few other non-default > mountpoints), but I stick with FAT for removable devices. > > It's probably worth pointing out that I don't need to mount the filesystem > to trigger the issue. Try http://www.FreeBSD.org/~jhb/patches/dma_sg.patch please. -- John Baldwin
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