AVG Disk Queue Length high or disk I/O overload

  • Dear All,

    We Have MSSQL Server 2000 SP4.

    My Machine is IBM X3650 M2 with 12 disk @ 300 GB SAS.

    8 disk using Raid 5 and the capacity is 1,8 TB, as Array X.

    4 disk using Raid 0 and the Capacity is 1,2 TB, as Array Z.

    Array X : use for 2 partition that are Drive C and D.

    "Drive C" use for WIndows 2003 Server System and MSSql Server and "Drive D" for MSSQL Server Data.

    Array Z : Use For MSSQL Server Logs.

    My Question are:

    1. On performance monitor, "AVg Disk Queue Length" often in high scale.

    Can someone help me, why it's can and resolve the problem?

    Thank You

  • This link should help

    http://www.sql-server-performance.com/articles/audit/hardware_bottlenecks_p1.aspx

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