hIOmon™
Disk I/O Ranger Display
Help Information

Brief help information for the following topics related to the hIOmon Disk I/O Ranger Display software is provided below:

Background Information

The hIOmon "Disk I/O Ranger Display" software can be used to display the hIOmon "Performance Threshold Range Metrics".  These unique hIOmon metrics are a selected set of summarized I/O operation performance metrics that are specifically focused upon the ranges of I/O operations per second (IOPS), megabytes-per-second (MB/s) data transfer rates, response time (RT), I/O operation queue depths/lengths (QD), and data transfer sizes/lengths (DTS) actually observed by the hIOmon I/O Monitor for individual devices, files, and processes.

The IOPS, MB/s, QD, and RT metrics are included within the automatically-summarized I/O operation performance information collected by the hIOmon I/O Monitor software.  The DTS summarized metrics are optionally collected separately.  Also note that the real-time capture of the hIOmon "Performance Threshold Range Metrics" does not require the collection into log files and the post-processing of I/O operation trace data.

These metrics can be accessed by the hIOmon Disk I/O Ranger Display using the hIOmon Windows Management Instrumentation (WMI) Support.  This WMI support can provide access to the local computer upon which the hIOmon Disk I/O Ranger Display software is installed (or to a remote computer with the requisite hIOmon version).  Remote access by the hIOmon Disk I/O Ranger Display via HTTP requests using the "hIOmon REST API" web service is additionally supported by the requisite hIOmon versions.  These metrics can also be directly retrieved from or exported/saved to a Comma-Separated-Values (CSV) formatted or Tab-Separated-Values (TSV) formatted "hIOmon Manager Export File".

Please note that the hIOmon "Performance Threshold Range Metrics” reflect the actual I/O operation activity observed by the hIOmon I/O Monitor software component.  For instance, the "IOPS 1 - 99" Range Count for read I/O operations reflects the number of one-second intervals during which the hIOmon I/O Monitor actually observed a total number of monitored read I/O operations that was between one and 99 read I/O operations inclusive.

Similarly, the "MBS 100 < 200" Range Count for write I/O operations reflects the number of one-second intervals during which the hIOmon I/O Monitor actually observed a total amount of data transferred by write I/O operations that was 100 000 000 bytes (i.e., 100 megabytes) or more, but less than 200 000 000 bytes (i.e., 200 megabytes).

The hIOmon "Disk I/O Ranger Display" is included within the:

The hIOmon "Performance Threshold Range Metrics" provide a quick and easy way to assess the actual "speeds and feeds" I/O performance of your particular files, devices and applications in everyday, normal usage!

The hIOmon "Disk I/O Ranger Display" also supports the display of the hIOmon "DataTransferred/Time Index (DXTI)" metric, which provides a "high-level" means for relative comparison of I/O performance, where basically "higher is better".

That is, the "higher" the DXTI number, the better the performance - as in more data transferred and/or less required response time (i.e., application wait).  It resembles the "fuel economy" index for an automotive vehicle (i.e., "miles-per-gallon" or "kilometres/litre") as an overall measure of "performance efficiency".

The installed hIOmon "Disk I/O Ranger Display" software included with the hIOmon WIOP and hIOmon WIOPF runs as a Microsoft Windows HTML Application (HTA).  See the sections immediately below for specific installation and configuration requirements.

Installation Information

NOTE that the following section pertains only to the hIOmon "Workload I/O Profiler (WIOP)":

The hIOmon WIOP software is provided within a software installation package file, either the "hIOmonInstall32.exe" file (for 32-but operating systems) or the "hIOmonInstall64.exe" file (for 64-bit operating system).  Simply run the software installation package, which will invoke the standard Windows Installer that will perform the actual installation of the hIOmon software.  Administrator privileges are required to perform the installation process, which typically takes just a few minutes to complete.

Please note that during this installation process, you will need to:

A "hIOmon Disk I/O Ranger" icon is placed upon the desktop along with the “Start -> Programs -> hIOmon -> hIOmon Disk I/O Ranger” shortcut (both of which are added by the Windows Installer as part of the hIOmon software installation process).

A " temporary licensing period" is established starting from the date upon which the WIOP software is installed.  A "hIOmon Activation Key" must be activated during this period so that the WIOP software can be used for the full time period purchased by the associated subscription fee.  See the "Activate" button for additional information.

NOTE that the following section pertains only to the hIOmon "Workload I/O Profiler Files (WIOPF)":

Like the WIOP, the WIOPF software is provided within a software installation package file, either the "hIOmonInstall32.exe" file (for 32-but operating systems) or the "hIOmonInstall64.exe" file (for 64-bit operating system).  Simply run the software installation package, which will invoke the standard Windows Installer that will perform the actual installation of the hIOmon software.  Administrator privileges are required to perform the installation process, which typically takes just a few minutes to complete.

Please note that during this installation process, you will need to:

A "hIOmon Disk I/O Ranger" icon is placed upon the desktop along with the “Start -> Programs -> hIOmon -> hIOmon Disk I/O Ranger” shortcut (both of which are added by the Windows Installer as part of the hIOmon software installation process).

A " temporary licensing period" is established starting from the date upon which the WIOPF software is installed.  A "hIOmon Activation Key" must be activated during this period so that the WIOPF software can be used for the full time period purchased by the associated subscription fee.  See the "Activate" button for additional information.

A "hIOmon Disk I/O Ranger" icon is placed upon the desktop along with the “Start -> Programs -> hIOmon -> hIOmon Disk I/O Ranger” shortcut (both of which are added by the Windows Installer as part of the hIOmon software installation process).

NOTE that the following section pertains only to the "On-the-Web (OTW)" version of the hIOmon Disk I/O Ranger Display software:

The "On-the-Web (OTW)" version runs within a supported Web Browser:

Configuration Information

NOTE that the following section pertains only to the hIOmon "Workload I/O Profiler (WIOP)":

The hIOmon ETW I/O Monitor software must be properly configured in order to collect the "Performance Threshold Range Metrics" for real-time display by the hIOmon Disk I/O Ranger Display.  This proper configuration includes an active/loaded hIOmon "Filter Selection" (see the "Filter Selection" description below) along with enabling the collection and processing of the I/O operation performance metrics.

A default automated configuration script (named "hIOmonCfgWIOP.vbs") creates a Filter Selection during the installation of the WIOP software.  This default Filter Selection specifies that the operating system physical disk associated with the system drive (typically the C: logical drive) is to be monitored by the hIOmon software.  A customized installation option is provided during the WIOP software installation process that allows you to also specify one or more Logical Disks whose associated physical disks are to be monitored.  See the "WIOP Installation" information above.

In addition, this automated configuration script activates/loads the created Filter Selection.  It then automatically enables the collection of the I/O operation performance metrics, including their summarization.

Please note that the "summary" metrics collected by hIOmon are summarized I/O operation performance metrics which are automatically aggregated by the hIOmon ETW I/O Monitor at the time that it observes the individual I/O operations as based upon the respective Microsoft ETW I/O operation trace data. 

A "Settings" button/option is located at the bottom of the "hIOmon Disk I/O Ranger Display" window.  Clicking on this button will cause the "Settings" popup window to be displayed.  The "Settings" window includes a "Reconfigure" button, which can be clicked to re-run the automated configuration script; as noted above, this script enables you to specify additional (or other) physical devices to be monitored by the hIOmon ETW I/O Monitor.

NOTE that no computer system restart is required to complete the activation of the configuration changes made by the automated configuration script.

The "Settings" window also allows you to select a specific hIOmon Manager Export File or ETW input log file whose I/O operation performance metrics are to be retrieved and shown within the hIOmon Disk I/O Ranger Display window (i.e., instead of the real-time metrics display).

Options are additionally provided that allow you to start and stop the retrieval of metrics from the selected hIOmon Manager Export File. 

NOTE that the following section pertains only to the hIOmon "Workload I/O Profiler Files (WIOPF)":

The hIOmon ETW I/O Monitor software must be properly configured in order to collect the "Performance Threshold Range Metrics" for display by the hIOmon Disk I/O Ranger Display.  This proper configuration includes an active/loaded hIOmon "Filter Selection" along with enabling the collection and processing of the I/O operation performance metrics.

The hIOmon "Filter Selection" specifies the particular devices/files that are to be monitored by the hIOmon I/O Monitor as well as the specific types of I/O operations to be monitored and the types of I/O operation performance metrics to be collected.  Moreover, the collection of I/O operation performance metrics generally begins when the Filter Selection is loaded/activated (these metrics are also reset to zeros when a Filter Selection is re-loaded/activated).

More specifically, the active Filter Selection must be configured to request the monitoring of read I/O operations (if "Read Range Counts" are to be displayed) and/or write I/O operations (if "Write Range Counts" as to be displayed) along with the collection of "summary" metrics (including "Device Summary" metrics)  for the particular devices and/or files of interest.

The default automated configuration script used by the WIOP software can be run during the installation of the WIOPF software.  A separate automated configuration script (named "hIOmonCfgWIOPiot.vbs") is also included within the hIOmon WIOPF software package.  This additional script can be used to configure the hIOmon WIOPF software so that it also collects device I/O operation trace records that are exported to a hIOmon Manager Export File.  See the WIOPF "Reconfigure" button option for how to run this script after the hIOmon WIOPF software has been installed.

NOTE that no computer system restart is required to complete the activation of the configuration changes made by the automated configuration script. 

Please note that the "summary" metrics collected by hIOmon are summarized I/O operation performance metrics which are automatically aggregated by the hIOmon ETW I/O Monitor at the time that it observes the individual I/O operations as based upon the respective Microsoft ETW I/O operation trace data.

The hIOmon "Disk I/O Ranger Display" provides a simple and quick way to display a selected subset (specifically the "Performance Threshold Range Metrics") within the large, comprehensive set of summary metrics that can be captured, displayed, and exported by hIOmon.

Please note that the WIOPF also provides configuration options that enable you to manually add, modify, and activate Filter Selections (including the ability to specify particular files that are to be monitored).  These WIOPF configuration options are in addition to the automated configuration script support that is included within the WIOP.  Additional information can be found within the "Getting Started" section below. 

NOTE that the following section pertains only to the "On-the-Web (OTW)" version of the hIOmon Disk I/O Ranger Display software:

Click on the "Settings" button/option located at the bottom of the "hIOmon Disk I/O Ranger" display window.  This will cause the "Settings" popup window to be displayed.

The "Settings" window allows you to select what is to be shown within the hIOmon DIOR Display window.

Options are also provided that allow you to start and stop the retrieval of I/O operation performance metrics from the selected source.  In addition, there are a number of other control options that, for example, enable you to select which particular I/O operation performance metrics are to be displayed.

Please note that web browser cookies must be enabled in order to save various display configuration options between successive "sessions" of the Disk I/O Ranger Display OTW.

Getting Started

NOTE that the following section pertains only to the hIOmon "Workload I/O Profiler (WIOP)":

To use/run the hIOmon Disk I/O Ranger Display, simply double-click upon the "hIOmon Disk I/O Ranger" desktop icon or use the “Start -> Programs -> hIOmon -> hIOmon Disk I/O Ranger” shortcut.

As noted within the "Configuration Information" section above, an automated configuration script is run during the installation of the WIOP software.  This script configures the hIOmon I/O Monitor software to monitor the operating system physical disk associated with the system drive (typically the C: logical drive).  A customized installation option is provided during the WIOP software installation process that allows you to also specify one (or more) other Logical Disks whose associated physical disks are to be monitored (i.e., leave the "Monitor only the System Drive and the associated physical volume/device" checkbox unchecked).

In addition, the script automatically configures the hIOmon software so that three distinct types of hIOmon Manager Export Files are created and activated.  These export files are configured to contain a comprehensive set of summarized I/O operation performance metrics for the individual physical devices and individual processes that are monitored.  These summary metrics go far beyond simple I/O operation counts and data transferred amounts and include the hIOmon "Performance Threshold Range Metrics", random and sequential access metrics, and much more.  In addition, these hIOmon Manager Export Files can subsequently be used as the input source of metrics for display by the hIOmon "Disk I/O Ranger Display".

One type of hIOmon Manager Export File will contain the summary I/O metrics for the physical disks being monitored.  A separate type will contain a variety of "Data Transfer Size (DTS)" summary metrics for the physical disks being monitored; these DTS metrics reflect I/O operation activity observed by the hIOmon I/O Monitor for I/O operations whose data transfer size/length was that of the corresponding size/length.  The third type will contain summary I/O metrics for each individual process instance that has its respective I/O operations performed by the physical disks being monitored.

Please note that these summary I/O operation performance metrics are collected upon a cumulative basis and are offloaded/written to the export files upon a ten-minute periodic basis.  The hIOmon Manager Export Files are configured so that the maximum allowed size for an individual export file is four mebibytes (i.e., roughly 4 megabytes).  A separate new hIOmon Manager Export File of the same type will automatically be created when this maximum size is reached for an export file.

Also note that the "Settings" window display "Reconfigure" button can be used to modify the hIOmon "Filter Selection" (so as to alter which particular devices are to be monitored) and that the use of this button does not modify any of the existing hIOmon Manager Export Files. 

NOTE that the following section pertains only to the hIOmon "Workload I/O Profiler Files (WIOPF)":

To use/run the hIOmon Disk I/O Ranger Display, simply double-click upon the "hIOmon Disk I/O Ranger" desktop icon or use the the “Start -> Programs -> hIOmon -> hIOmon Disk I/O Ranger” shortcut.

When first run after the installation of the hIOmon WIOPF software package, the hIOmon Disk I/O Ranger Display application will by default determine whether there is an existing Filter Selection that is currently active.  An active Filter Selection will be found if you selected the default automated configuration script to be run during the installation of the WIOPF software.

If no active Filter Selection is found, then the hIOmon Disk I/O Ranger Display application will automatically perform the following steps:

  1. Create a Filter Selection (named "IORangerFS" by default) that will include a single filter specifying that both read and write I/O operations for all files upon the system drive (typically the "C:" logical disk) are to be monitored by the hIOmon I/O Monitor and that "summary" I/O operation performance metrics are to be collected for the monitored files.

  2. In addition, "Device Summary" metrics will also be collected for the system drive; these "Device Summary" metrics reflect the combined totals for all of the monitored files that reside upon the system drive logical disk and for which the hIOmon I/O Monitor observed read and/or write I/O operations.

  3. Will display an input prompt asking whether you also want both read and write I/O operations to be monitored by the hIOmon I/O Monitor for the operating system physical disk associated with the system drive logical disk.  If you enter a response indicating "Yes", then an additional filter for this physical disk will be included within the created Filter Selection; this filter will specify that "summary" I/O operation performance metrics are to be collected by the hIOmon I/O Monitor for both read and write I/O operations to the physical disk.

    If the associated physical disk is to be monitored, then an additional input prompt will be displayed asking whether you also want to collect "Data Transfer Size (DTS)" metrics for the physical disk.  Note that these DTS metrics will be collected upon a "device summary" basis for the physical disk.

  4. After successfully creating this "IORangerFS" Filter Selection, the hIOmon Disk I/O Ranger Display application will then load/activate this Filter Selection and then activate the collection of the requested I/O operation performance metrics within the hIOmon I/O Monitor.  The hIOmon I/O Monitor will immediately begin monitoring I/O operations for files residing upon the system drive logical disk and collecting summary metrics.

    Please note that no reboot of the system will be required.

  5. The hIOmon Disk I/O Ranger Display application will then make the "IORangerFS" Filter Selection the "default" Filter Selection.  The hIOmon Manager software component loads the "default" Filter Selection (if any) automatically each time the system is started.

The hIOmon Disk I/O Ranger Display application is initially configured so that only the combined "Read/Write" IOPS and ResponseTime (RT) metrics are displayed, with the display refreshed with the current metric values upon a five-second periodic basis.  This initial configuration does not include the optional collection of the DTS (Data Transfer Size) summary metrics.

Please note that the above configuration settings for the hIOmon Disk I/O Ranger Display application can be changed by using the "Settings" button/option at the bottom of the "Main Display".

NOTE that the following section pertains only to the "On-the-Web (OTW)" version of the hIOmon Disk I/O Ranger Display software:

The On-The-Web version of the hIOmon Disk I/O Ranger software can be accessed at the web site made available by the hIOmon REST API web service.

This web site is identified by the particular remote computer name, domain name, or IP address followed by the specific port associated with the hIOmon REST API web service.

The specific URL for the hIOmon Disk I/O Ranger OTW includes "/hIOmonOnTheWeb/hIOmonDiskIORanger/hIOmonDiskIORangerOTW.html"; for example (where "xxx.xxx.xx.xx" is the IP address and "pppp" is the port number):

http://xxx.xxx.xx.xx:pppp/hIOmonOnTheWeb/hIOmonDiskIORanger/hIOmonDiskIORangerOTW.html

The hIOmon DIOR Display OTW can be accessed using either HTTP or HTTPS.  See the "Remote Computer Setting" help information for how to specify a web site address (i.e., a remote computer) using the hIOmon REST API and HTTPS.

A "Session Sign-In" pop-up window will immediately then be shown upon access.  Your "session" (i.e., your use of the hIOmon DIOR Display OTW) will begin after you have successfully performed the "session sign-in".  The "Settings" button and the "Trender Display" button located at the bottom of the "hIOmon Disk I/O Ranger" display window will both be enabled once you have successfully signed-in.  Click on the "Settings" button to select the particular monitored item and I/O operation performance metrics to be displayed.  Also see the "OTW Configuration Information" above.

A "Session Sign-Out" pop-up window will appear to notify you that your session has ended.  It will be displayed when you close the hIOmon DIOR Display OTW web browser window.

If you are using a Safari browser, please note that you must click on the "Close" button to perform a "Session Sign-Out" rather than simply closing the web browser window.  This "Close" button will be located to the right of the "Settings" and "Trender Display" buttons at the bottom of the main hIOmon Disk I/O Ranger Display.

Your web browser settings must be configured to allow Pop-Ups so that these session sign-in and sign-out pop-up windows can be displayed.  Typically pop-ups can be allowed by disabling the Pop-Up Blocker within the web browser.

The Session Sign-In display window will show you the number of days remaining within the hIOmon REST API subscription period along with the subscription ending date.  You can also click the "About" button upon the "Settings" display window to show the expiration date.

Main Display

The Main Display includes the optional detailed display of the basic "Performance Threshold Range Metric" groups (i.e., the IOPS, MBs, Queue Depth (QD), Response Time (RT), and Data Transfer Size (DTS) Range Counts) along with important contextual information:

The "Settings" button at the bottom of the Main Display can be used to select a different monitored item to be displayed.  Simply click on the "Settings" button, then select the item of interest from the drop-down list box of names near the top of the "Settings" window and click on the "OK" button at the bottom of the "Settings" window.  The hIOmon Disk I/O Ranger display window will change to display the summary I/O operation performance metrics for the selected item of interest; also note that the selected item will be highlighted with a green background within the drop-down list of names (since it is the item currently being shown within the hIOmon Disk I/O Ranger display).  See the "Metrics for monitored:" description below for additional details.

An "Active Time" percentage is additionally displayed.  This value reflects the percentage of time during the Observation Period that I/O operations were active for the monitored item (i.e., issued I/O operations being processed, including those queued).

The read "Random I/O operation percentage" is calculated by dividing the number of random read I/O operations by the combined sum of random read and sequential read I/O operations.  An I/O operation is considered to be sequential if its starting data transfer address is contiguous to the ending data transfer address of the prior I/O operation; in the case of the "Read random I/O operation percentage", the prior read I/O operation applies.  Please also note that the first I/O operation to a file is considered to be neither a random nor a sequential I/O operation; this also applies to the first monitored I/O operation to a physical device.

The read "Random data transferred percentage" reflects the percentage of the data that was transferred by the random read I/O operations.  This percentage is calculated by dividing the amount of data transferred by the random read I/O operations by the combined sum of the data transferred by the random read and by the sequential read I/O operations.

The hIOmon read "DataTransferred/Time Index (DXTI)" metric is calculated by simply taking the observed overall total amount of data transferred by the read I/O operations (converted to megabytes for scaling), and then dividing this combined total amount by the corresponding combined sum of the observed time durations (i.e., response times) of the read I/O operations that were performed to transfer this data.  The resulting value is considered to be an index.

The basic idea behind the hIOmon "DataTransferred/Time Index" metric is straightforward and simple:  "Better" storage I/O operation performance is fundamentally about transferring (more) data faster.  So for a given amount of data, transferring this data more quickly (i.e., in less time).  And similarly, transferring more data within the same amount of time.  More specifically, the relationship is basically between the amount of data transferred and the corresponding amount of time that it took to perform the I/O operations required for the data transfer.

Overall, this Index metric provides a "high-level" means for relative comparison of I/O performance, where basically "higher is better"; that is, the "higher" the Index number, the better the performance - as in more data transferred and/or less required response time (i.e., application wait).  It resembles the "fuel economy" index for an automotive vehicle (i.e., "miles-per-gallon" or "kilometres/litre") as an overall measure of "performance efficiency".  It is akin to more miles driven (more data transferred) for fuel used (response time taken to transfer this data), or similarly, same miles (data transferred) but less fuel (less response time).

Lastly. please note that you can select (within the "Settings" option window) whether the IOPS, MBs, QD, RT, and/or DTS Range Counts (as described below) are to be shown within the "Main Display".  Note that at least one of the "Read Range Counts" display options must be selected for the Read metrics to appear; also if no read I/O operations have been observed by the hIOmon I/O Monitor, then nothing will be displayed for the "Read Range Counts".

Also please note the following:

  1. All of the above metrics reflect the total, cumulative values that have been automatically accumulated by the hIOmon I/O Monitor during the indicated Observation Period.  Also please note that only those I/O operations that were successfully performed (i.e., transferred data) are included within the displayed IOPS, MBs, RT, and DTS Range Counts.  In addition, the DTS Range Counts require that the separate, optional collection of DTS summary metrics be enabled within the Filter Selection for the particular file, device, and/or process of interest.

  2. Note that the first "one-second interval" begins with the first monitored read (in the case of the read and the combined read/write metrics) or write (in the case of the write and the combined read/write metrics) I/O operation observed by the hIOmon I/O Monitor for the respective file, device, or process.

  3. The metrics are displayed upon a individual monitored item basis (i.e., for a single file, process, logical disk, or physical device).  The "Settings" button/option can be used to select a different monitored item for which the metrics are to be displayed.

  4. The display of the metric values is periodically refreshed/updated automatically to the current values (real-time metrics) or the latest retrieved values (from a hIOmon Manager Export File).  You can view the refresh/retrieval time interval by clicking on the "Settings" button/option; the "Settings" options can also be used to select a different refresh/retrieval time interval.  Also please note that only those IOPS, MBs, QD, RT, and DTS Range Counts that have a non-zero value are displayed.

  5. An error indication may be displayed near the bottom of the Main Display in the event that the hIOmon Disk I/O Ranger Display software encounters an error.  Click on the "Settings" option/button to view additional details about the error.

  6. If a Filter Selection change is made while the installed version of the hIOmon Disk I/O Ranger Display software is active (i.e., is running), then the hIOmon Disk I/O Ranger Display will subsequently display the selected metrics for the new Observation Period.

  7. You can invoke/run more than one instance of the installed hIOmon Disk I/O Ranger Display application.  Each instance can be configured to display the current metrics for a different monitored item (i.e., file, process, logical disk, or physical device).

Settings Display

The Settings Display includes the following display information and configuration options:

I/O Trender Display

A "Trender Display" button appears to the right of the "Settings" button upon the Main Display window of the hIOmon Disk I/O Ranger when the hIOmon "I/O Trender Display" feature has been enabled and the required Internet Explorer version 10.0 or higher is installed.

The hIOmon "I/O Trender Display" can be used to optionally display - within a graphical format - metrics that have been retrieved by the hIOmon Disk I/O Ranger.  The hIOmon "I/O Trender Display" runs in conjunction with the hIOmon "Disk I/O Ranger Display", which transfers to the I/O Trender Display various metrics that it has retrieved.  These metrics are then shown by the I/O Trender Display in accordance with the various configuration options that are provided by the I/O Trender Display.

The "I/O Trender Display" graphs/charts are shown within the bottom frame of the hIOmon Disk I/O Ranger "Main Display".

See the help information provided by the hIOmon "I/O Trender Display" for additional information about the hIOmon "I/O Trender Display".  This help information can be accessed by clicking upon the "Customize" button located at the top of the "I/O Trender Display" window; this will cause the Trender "Settings" display panel to be shown.  The "Help" button at the bottom of the Trender "Settings" display panel can be used to display the hIOmon "I/O Trender Display" help information.

Error Messages

The following error, warning, and informational messages can be displayed by the hIOmon Disk I/O Ranger Display:

Please note that a previously enabled/activated export file must first be stopped (if currently active) and then deleted before you can change (i.e., add and/or remove) the export metric fields selected to be included within the export file.

This error can be due to a filter present within the Filter Selection that specifies a device name for a device type which is not supported (e.g., a DVD).  Please check the Application Event Log for hIOmon entries (e.g., with a Source of "hIOmonGr") that provide additional error information.

When the hIOmon Manager has detected that the expiration date has been reached, it will write an entry (Event ID 499, Source hIOmonGr) to the Application Event Log noting that the trial use of the hIOmon software has expired; the hIOmon Manager will then terminate its processing.

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