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  1. #1

    3Ware Hardware RAID - Auto Verify ON or OFF

    As per the title, what setting do you use and why please?

    We're finding on servers with it OFF that there are no issues, but on servers with it ON every so often it kicks a drive to DEVICE-ERROR status and the unit into DEGRADED status even though further checks on the drive show all is good.

    Regards,
    Suhail.
    OSHS Ltd
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  2. #2
    Join Date
    Dec 2005
    Location
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    What drives are you using?

    50% of our servers are 3Ware cards (9650se, 9690sa, 9740-4i) and I'm pretty sure all of them have auto-verify turned on.

    I've never had any issues with it, are you sure there is no chassis vibratrion? We had issues with a few cheaper chassis causing lots of RAID dropouts but since replacing the fans + seating with rubber grommits all is well.
    System Administrator (RHCE, LFCS, cPPC::Tech)
    PCSmart Group.

  3. #3
    Join Date
    Dec 2005
    Location
    Berkshire, UK
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    3,074
    Code:
    Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache  AVrfy
    ------------------------------------------------------------------------------
    u0    RAID-10   OK             -       -       64K     596.025   ON     ON
    
    ~]# uptime
     14:40:39 up 304 days,  9:36,  1 user,  load average: 0.31, 0.14, 0.09
    System Administrator (RHCE, LFCS, cPPC::Tech)
    PCSmart Group.

  4. #4
    Join Date
    Jun 2002
    Location
    Waco, TX
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    5,084
    We have multiple dozens of 3ware cards, all have auto verify on. In the rare occasion one is kicked out of RAID and rebuilt it generally fails in the next month or so....so we take those device error reports seriously
    Jodohost Operations Manager Twitter status feed: https://twitter.com/jodohostcom
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  5. #5
    Thanks for your replies.

    Server chassis are mainly SuperMicro and drives WD Caviar.

    The vibration issue is interesting, will look into this.

    But my real question is why use auto verify ON? What's the purpose?
    OSHS Ltd
    OSHS Services - DNS Clusters | R1Soft Licenses | Remote Backup Storage | R1Soft CDP Storage | Cheap Dedicated Servers
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  6. #6
    Join Date
    Dec 2005
    Location
    Berkshire, UK
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    Just to check the integrity of the array. You shouldnt need to have it on, but it doesnt hurt. I've had an array go inconsistent on Adaptec cards before even when the array was optimal.
    System Administrator (RHCE, LFCS, cPPC::Tech)
    PCSmart Group.

  7. #7
    Join Date
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    Location
    Prague, Czech Republic
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    Always keep it on, and never had a problem.
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