Date: Wed, 29 Sep 2010 16:18:21 +0100 From: Karl Pielorz <kpielorz_lst@tdx.co.uk> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-fs@freebsd.org Subject: Re: FreeBSD 8.1-R/amd64 - zfs 'hangs' - help tracing? Message-ID: <24249EBE70346EDE973308F6@HexaDeca64.dmpriest.net.uk> In-Reply-To: <20100929151111.GA91705@icarus.home.lan> References: <E535F873EBCF64D19AC01035@HexaDeca64.dmpriest.net.uk> <20100929151111.GA91705@icarus.home.lan>
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--On 29 September 2010 08:11 -0700 Jeremy Chadwick <freebsd@jdc.parodius.com> wrote: > Can you provide (with the disks hooked to an ATA/SATA controller and > the system not wedged waiting for ZFS I/O) the output from smartctl > (you'll probably have to install ports/sysutils/smartmontools) as: > > smartctl -a /dev/adXX (one command per device) > > I can review these statistics to see if any of the disks look like they > may be misbehaving. > > It would also help if you could provide dmesg output associated with the > ATA/SATA controller which they're hooked to. I can do - I'll try to get all the relevant stuff up on a site and send you the URL (i.e. dmesg output, zpool status output, smartctl output etc.) The same system works fine under 7.2-Stable with the same drives, hardware etc. - But under 8.1 anything more than "a ZFS little I/O" (e.g. scrubs, copying lots of files etc.) - and it just hangs at a random point, with no error given - and anything that touches the zpool 'hangs next'. I already run smartmontools - though it's currently disabled (incase it was that causing issues). The drives on the whole look OK, I think two have picked up a couple of reallocated blocks (and failed reads) - but it's nothing that's increasing or anything - and like I said, 7.2-S is fine with the same setup... If I break to KDB with the current system, is there anything I can do to get a better look at what's hung up/where? -Karl
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