Date: Fri, 25 Mar 2011 14:50:31 -0700 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-stable@freebsd.org Subject: Re: deadlock or bad disk ? RELENG_8 Message-ID: <20110325215031.GA36689@icarus.home.lan> In-Reply-To: <E7D9912CFA4E4E9987BAA2CF5F3F6CA3@multiplay.co.uk> References: <20100719023419.GA91006@icarus.home.lan> <201007190301.o6J31Hs1045607@lava.sentex.ca> <20100719033424.GA92607@icarus.home.lan> <201007191237.o6JCbmj7049339@lava.sentex.ca> <20100719203320.GB21088@icarus.home.lan> <011E0838F0EC4E80885646C70B34F8AB@multiplay.co.uk> <4D8C9495.90103@sentex.net> <716F58E43EA845E3A2228F020D85DFBB@multiplay.co.uk> <20110325144124.GA29033@icarus.home.lan> <E7D9912CFA4E4E9987BAA2CF5F3F6CA3@multiplay.co.uk>
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On Fri, Mar 25, 2011 at 03:37:55PM -0000, Steven Hartland wrote: > ----- Original Message ----- From: "Jeremy Chadwick" > <freebsd@jdc.parodius.com> > > >I apologise in advance if I have already reviewed your situation, but if > >you could please provide full "smartctl -a" output for the disk, I can > >review the data to see if anything looks out of place. > > > >An example: on some (not all) Western Digital "Green" disks, including > >enterprise models, Attribute 193 showing an extremely large RAW_VALUE > >(in the tens of thousands, if not more) indicates the drive is trying to > >park its actuator arm/heads constantly. The result: abysmal > >performance. One cannot key off of the firmware version as an indicator > >(WD does not always increase/change the firmware string). Some users > >have been able to get WD to admit the problem + provide them a fixed > >firmware. > > > >My point: looking at SMART attributes doesn't help unless you know > >exactly what to look for, are familiar with all the quirks of drive > >models, and basically act as an information sponge (subscribe to all > >sorts of mailing lists, talk to users, help generic non-technical > >end users out, etc.). It takes up a lot of my time, but I try my best. > >Sometimes I feel like my brain needs checksumming... > > Thanks for the offer Jeremy unfortunately I'm in the same position Mike > was as these disks are behind an areca which doesn't show raw values :( > > I've raised this with their support as an issue with their areca-cli > utility so hopefully they will fix. Alternatively maybe smartctl > will > add support for the areca under freebsd in the future. Bummer. Competitor's drivers make use of pass(4) and/or xpt(4), the result being that you can see (and talk to directly) all the disks which are on the RAID card. No need for a CLI utility getting in the way, etc.. It would benefit Areca if they added support for this to their driver. -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP 4BD6C0CB |
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