On Fri, Mar 25, 2011 at 03:37:55PM -0000, Steven Hartland wrote: > ----- Original Message ----- From: "Jeremy Chadwick" > <free...@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 j...@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP 4BD6C0CB | _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
