Date: Thu, 16 Apr 2009 15:35:18 -0400 From: John Baldwin <jhb@freebsd.org> To: Alexey Shuvaev <shuvaev@physik.uni-wuerzburg.de> Cc: Damian Gerow <dgerow@afflictions.org>, freebsd-current@freebsd.org Subject: Re: ZFS checksum errors on umass(4) insertion Message-ID: <200904161535.19220.jhb@freebsd.org> In-Reply-To: <20090416182455.GA60341@wep4035.physik.uni-wuerzburg.de> References: <49BD117B.2080706@163.com> <200904161327.46509.jhb@freebsd.org> <20090416182455.GA60341@wep4035.physik.uni-wuerzburg.de>
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On Thursday 16 April 2009 2:24:55 pm Alexey Shuvaev wrote: > On Thu, Apr 16, 2009 at 01:27:46PM -0400, John Baldwin wrote: > > 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. > > > You mean dma_pg.patch? ^^^^^^^^^^^^^ Yes, and it is now symlinked to dma_sg as well. :) -- John Baldwin
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