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- DOCUMENT:Q103934 19-OCT-1993 [W_NT]
- TITLE :Adding More Than Two IDE or ESDI Drives in Windows NT
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- ----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system version 3.1
- - Microsoft Windows NT Advanced Server version 3.1
- ----------------------------------------------------------------------
-
- WARNING: Using Registry Editor incorrectly can cause
- serious, system-wide problems that may require you to
- reinstall Windows NT to correct them. Microsoft cannot
- guarantee that any problems resulting from the use of
- Registry Editor can be solved. Use this tool at your own
- risk.
-
- If a computer has more than two IDE or ESDI hard disk drives and needs
- an MS-DOS-based device driver to use the extra drives, Windows NT may
- not be able to use the extra drives by default.
-
- To configure more than two IDE or ESDI hard disk drives with Windows
- NT, the Registry (REGEDT32.EXE) must be modified to add the
- information on the extra drives. You will also need technical
- information about your drives, which should be the documentation that
- came with them.
-
-
- NOTE: To make the changes in the Registry, you must be logged on as an
- Administrator.
-
- MORE INFORMATION
- ================
-
- This procedure should only be necessary if you are adding a third or
- higher IDE or ESDI hard disk drive or your secondary IDE or ESDI drive
- is at a nonstandard address. If the drive is at a nonstandard address,
- then use the following procedure to add the correct address in the
- Registry. The Key name in this case would be either 1 or 2.
-
- NOTE: The information in this article applies only to Intel x86
- architecture computers.
-
- To add support for three or more IDE or ESDI hard disk drives in
- Windows NT, do the following:
-
- 1. Open the Registry Editor (REGEDT32.EXE).
-
- 2. Use the following path:
-
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Atdisk
-
- 3. From the Edit menu, choose Add Key to create the following entry:
-
- Key Name: PARAMETERS
- Class: <blank>
-
- 4. Open the PARAMETERS key that you created in Step 3.
-
- 5. From the Edit menu, choose Add Key to create the following entries
-
- Key Name: X
- Class: <blank>
-
- where X = number of the additional drive, such as 2 for the third
- drive. For each additional drive, increment the Key Name by 1. You
- generally MUST specify the starting parameter as 2 or higher. This is
- so that you don't interfere with the primary or secondary controller
- that most BIOS's support.
-
- 6. Select the key that you created in step 5.
-
- 7. From the Edit menu, choose Add value and add the following values.
- Set the Data Type of all three entries to REG_DWORD.
-
- BaseAddress
- -----------
- This is the physical address of the Data register for the controller.
-
- DriveControl
- ------------
- This is the physical address of the drive control register of
- the controller. Often this is 0x206 off of the BaseAddress
- register.
-
- Interrupt
- ---------
- This is the interrupt that the controller will use.
-
- Here what a sample registry entry looks like for adding a Quantum EZ
- hard disk onto a COMPAQ 486/33L. This computer has a simple ESDI drive
- as its primary controller.
-
- HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Atdisk
- \Parameters\2
-
- BaseAddress = REG_DWORD 0x320
- DriveControl = REG_DWORD 0x32e
- Interrupt = REG_DWORD 0xa
-
- NOTE: On an R4000 ARC computer, you should not have to add anything if
- you use the IDE "adapter" card at the usual 0x1f0 or 0x170 address.
-
- Additional reference words: 3.10 W_NTAS gateway compaq
- KBCategory:
- KBSubcategory: hrdwr
- \* Additional information provided by TonyE
-
- =============================================================================
-
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-
- Copyright Microsoft Corporation 1993.