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This article provides a solution to performance issues that occur when you work with files that are located on a file server.

Original product version: Windows 10 - all editions, Windows Server 2012 R2
Original KB number: 822219

Symptoms

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You may experience one or more of the following symptoms when you work with files over the network:

• A Windows-based file server that is configured as a file and print server stops responding and file and print server functionality temporarily stops.

• You experience an unexpectedly long delay when you open, save, close, delete, or print files that are located on a shared resource.

• You experience a temporary decrease in performance when you use a program over the network. Performance typically slows down for approximately 40 to 45 seconds. However, some delays may last up to 5 minutes.

• You experience a delay when you perform file copy or backup operations.

• Windows Explorer stops responding when you connect to a shared resource or you see a red X on the connected network drive in Windows Explorer.

• When you log on to the file server, after you type your name and password in the Log On to Windows dialog box, a blank screen appears. The desktop does not appear.

• A program that uses remote procedure call (RPC) or uses named pipes to connect to a file server stops responding.

• The server temporarily stops responding and one or more event ID messages similar to the following messages appear in the System log on the file server.

• You receive an error message similar to one of the following messages when you try to connect to a shared resource:

  • Error message 1

    System error 53. The network path was not found.

  • Error message 2

    System error 64. The specified network name is no longer available.

• You are intermittently disconnected from network resources, and you cannot reconnect to the network resources on the file server. However, you can ping the server, and you can use a Terminal Services session to connect to the server.

• If multiple users try to access Microsoft Office documents on the server, the File is locked for editing dialog box does not always appear when the second user opens the file.

• A network trace indicates a 30 to 40-second delay between an SMB Service client command and a response from the file server.

• When you try to open an Access 2.0 database file (.mdb file) in Microsoft Access 97, in Access 2000, or in Access 2002, you may receive an error message that is similar to the following:

  Disk or network error.

• When you try to open a Microsoft Word file, you may receive the following error message:

  Word failed reading from this file file_name. Please restore the network connection or replace the floppy disk and retry.

Cause

This issue may occur if a non-Microsoft program that is installed on your computer uses an outdated kernel-mode filter driver. The kernel-mode filter driver may be outdated if the following conditions are true:

• One of the following programs is installed on the computer:

  • ARCserve Backup Agent for Open Files or ARCserve Open File Agent from Computer Associates International, Inc. is installed on your computer, and the Ofant.sys driver for the program is outdated.

  • Open Transaction Manager is installed on your computer, and the Otman.sys driver for the program is outdated.

    Note

    Open Transaction Manager is included with certain programs from VERITAS Software Corporation, but it can also be installed separately from the VERITAS program. For example, Open Transaction Manager may be included with Open File Option. This program may be included with VERITAS Backup Exec.

  • A VERITAS program that uses the Otman4.sys or Otman5.sys driver (such as Open File Option) is installed on your computer, and the Otman4.sys or Otman5.sys driver for the program is outdated.

• The driver for the program is incompatible with the filter driver that is installed on the computer by a non-Microsoft antivirus program. As a result, the filter driver on the server may return an incorrect status code to the Server service. For example, the filter driver may return a STATUS_SUCCESS code instead of a STATUS_OPLOCK_BREAK_IN_PROGRESS code.

Resolution

To resolve this issue, contact the manufacturer of the program to inquire about the availability of a filter driver update. For more information about how to contact Computer Associates to obtain the latest update for the Ofant.sys driver, visit Computer Associates.

If you installed Open Transaction Manager separately, contact Columbia Data Products, Inc. to inquire about the availability of an update that may resolve this issue. To contact Columbia Data Products, visit Columbia Data Products.

For more information about how to contact VERITAS, visit VERITAS support

More information

Important

This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see How to back up and restore the registry in Windows.

To temporarily work around this issue, restart the Server services on the server. To restart the Server services, follow these steps:

1. Click Start, and then click Run.

2. In the Open box, type cmd, and then click OK.

3. At the command prompt, type the following lines, and press Enter after each line:

To troubleshoot this issue, use any of the following methods:

• Use Performance Logs and Alerts to monitor the Avg. Disk Queue Length counter of the PhysicalDisk performance object. Under ordinary conditions, the number of waiting input/output (I/O) requests is typically no more than 1.5 to 2 times the number of spindles that the physical disk has. Most disks have one spindle, although redundant array of independent disks (RAID) devices typically have more than one spindle. When a program runs small successive I/O operations, you see a spike in the Current Disk Queue Length counter when I/O-bound operations are queued. You may also see an increase in the Context Switches/sec counter of the System performance object.

• Disable opportunistic locking on either the client or on the server. To disable opportunistic locking on the client, set the following registry value to 1:

  HKEY_LOCAL_MACHINESystemCurrentControlSetServicesMRXSmbParametersOplocksDisabled

  To disable opportunistic locking on the server, set the following registry value to 0:

  HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanServerParametersEnableOplocks

  For more information about how to disable opportunistic locking, see Configuring opportunistic locking in Windows.

• Edit the registry to temporarily deactivate the filter driver.

  For more information about how to temporarily deactivate the kernel-mode filter driver, see How to temporarily deactivate the kernel mode filter driver in Windows.

  The registry key that stores information for the Ofant.sys driver is Ofadriver.

References

Third-party information disclaimer

Veritas Software Driver Windows 10

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

TexecomPro App

TexecomPro is a free app, providing Texecom Registered Installers access to technical product information.

Download the app and login using your existing Texecom Registered Installer login credentials.

Premier Elite Firmware

For use with a PC and the Premier Flasher interface

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The Premier Elite Flasher Interface can be used to update the Premier Elite Control Panels firmware, allowing additional features and functions to be added to existing systems.

Texecom Cloud

Manage, configure and control your alarm system portfolio.

Texecom Cloud is a web-based portal operating on any internet-connected device and is compatible with connected Premier Elite systems*.

Features include:

• Remote Maintenance
• On-site Programming
• Access Anywhere
• Managed Access
• Custom Branding (Coming Soon)**

*System requirements: Texecom Cloud is compatible with Premier Elite systems using Texecom Connect SmartCom or Premier Elite ComIP communications. Requires Premier Elite firmware V4.01 and above (for SmartCom connectivity) or V2.11 and above (for ComIP connectivity)
**Requires Gold Membership

Wintex Software

Texecom’s user-friendly Windows™ based software, designed for use with the Premier Elite Series of control panels, provides complete upload/download and systems diagnostics for total control and flexibility. Windows is a registered trademark of Microsoft Corporation.

Current software version: 7.2.2

Ricochet Monitor Software

Provides greater diagnostics and configuration control over wireless system setup than ever before. Delivers device status and attribute selection with real-time graphical representation of mesh-network wireless systems.

Current software version: 2.18.10

EN Calculator Software

Compatible with Texecom’s full range of control panels, the ENCalculator calculates current drawn from required peripheral products, and indicates whether the system will meet the battery standby times and maximum alarm current requirements
stipulated under EN 50131-1.

Montex Software

Software based alarm receiver interface for connecting with Premier ComIP alarm signalling equipment. Supports fast format, contact ID and SIA communication protocols. Manages received polling information for each monitored site.

Texbase Software

Texbase is an alarm management software package designed for use in conjunction with the Premier Elite Com IP and Montex software, ideally suited to installers who wish to individually monitor their installed security systems for specific alarm signals. Texbase is event selectable, features include printable reports, detailed account history and alarm status emailing.

Veritas UDL Software

The Veritas R8 Plus and Veritas Excel both support local uploading and downloading from a PC running Veritas UDL Software.

Uploading and downloading can be used to program and interrogate the control panel.

Premier Elite ComPort+

Plug-on PCB that converts the on-board digital communicator connector on Premier Elite control panels* into serial communications port ComPort 3**.
This adaptor, when used in conjunction with Premier Elite V3.00 firmware or above, allows three serial communication ports to be used simultaneously for use with compatible products.
Available in a pack of 5 adaptors.
*Except the Premier Elite 640, which has three serial communicator ports as standard
**When fitted with a ComPort+, the onboard digital communicator cannot be used

Premier Elite TTLCom

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• Converts network signals to TTL, and vice versa.
• Compatible with Premier and Premier Elite control systems
• Interfaces with any fibre optic modem that operate full duplex 5V TTL signal inputs

Premier Elite USB-Com

USB interface connector for connection between control panel and PC, enabling local upload/download.

Veritas Software Corporation

Premier Elite USB Modem

Designed specifically for use with Wintex UDL software and a PC to allow trouble free uploading/downloading with Premier Series and Premier International Series control panels.

Premier Elite PC-Com

Serial interface connector for connection between control panel and PC, enabling local upload/download.