Microsoft KB Archive/85681

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Future Domain SCSI Host Adapters Do Not Require Double Buffer

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Q85681

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The information in this article applies to:


 * Microsoft Windows 3.1

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SUMMARY
Future Domain technical support has confirmed that the double buffering portion of SMARTDrive 4.0 that is provided with Windows 3.1 is not required on all Future Domain model TMC-8X 8-bit and TMC-16X 16-bit SCSI controllers (where X is an integer completing the model number).

MORE INFORMATION
Although Windows 3.1 Setup may install SMARTDrive with double buffering in the CONFIG.SYS file, it is not required and may degrade the performance of the computer.

The following is a list of the Future Domain SCSI controller models that do not require double buffering:


 * TMC-820, 830, 840, 850, 860, 870, 875, 880, 885, 850M, 860M, 885M
 * TMC-1650, 1660, 1670, 1680

According to Future Domain technical support, these particular models of SCSI controllers do not use DMA access, and would not require the double buffering portion of SMARTDrive to be loaded.

Disabling Double Buffering
To disable the double buffering portion of SMARTDrive, remove the following line from the CONFIG.SYS file:

    DEVICE=C:\WINDOWS\SMARTDRV.EXE /DOUBLE_BUFFER For further information on Future Domain controllers, and how to determine the SCSI model number, contact Future Domain technical support at (714) 253-0428.

Additional query words: 3.10 double_buffer db smart drive

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Issue type :

Technology : kbWin3xSearch kbWin310