Date: Mon, 24 Jan 2011 10:34:07 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-usb@freebsd.org Subject: Re: System lockups caused by USB external HDD Message-ID: <201101241034.07591.hselasky@c2i.net> In-Reply-To: <4D3D3FC5.9010205@gmail.com> References: <4D3CAE4E.2040407@gmail.com> <5253D900-7A8F-43D7-8E86-88C0A14EF0B8@gsoft.com.au> <4D3D3FC5.9010205@gmail.com>
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On Monday 24 January 2011 10:00:53 CDP wrote: > On 01/24/11 01:56, Daniel O'Connor wrote: > > On 24/01/2011, at 9:10, CDP wrote: > >> g_vfs_done():da0s2[WRITE(offset=xxxxxxxxxxxx, length=16384)]error = 5 > >> [several more lines similar to the above] > >> panic: softdep_move_dependencies: need merge code > >> cpuid = 0 > >> KDB: stack backtrace: > >> #0 0x... at kdb_backtrace+0x5e > >> #1 0x... at panic+0x182 > > > > It looks like the disk is dying, or the FS is corrupt (the former might > > cause the later). > > > > Can you run smartctl on the disk? Unfortunately a lot of enclosures > > reject SMART commands so you might not be able to :( > > I have attached the output of smartctl -d sat -a /dev/da0. I didn't yet > run a SMART long test for the simple reason that the disk is going into > sleep mode and interrupts it. Haven't bothered to keep it alive for a > long test but I might just do that. > > Although, I doubt it's a disk failure, since I do backups on it without > problems by using FreeBSD 7.3, on the same space where FreeBSD 8.x > fails. And I am talking about over 150GB of data in one run, while > 8.2-RC2 crashes after 5-10GB. I have experienced disk failure in the > past, on SATA, and a few read/write errors never caused a system lockup. > > My feeling is that enough traffic on USB causes the problem, and that > this problem is only present in the new USB stack. > Unfortunately downgrading to 7.x is not an option because there are > things that won't work on this notebook. If you run a simple test like this: dd if=/dev/da0 of=/dev/null bs=65536 dd if=/dev/da0 of=/dev/null bs=16384 Do you then see any errors? Do you have a spare USB memory stick which you could run similar write tests on? --HPS
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