deadlock or bad disk ? RELENG_8

[Steven Hartland]

----- Original Message ----- 
From: "Jeremy Chadwick" <freebsd at 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.

    Regards    
    Steve

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