HP Tc2120 HP Server Ultra 3 SCSI Host Bus Adapter Installation and Configurati - Page 28

DisableSynchronousTransfers, DisableDisconnects, MaximumLogicalUnit, Maximum SGList

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Chapter 3 Microsoft Windows NT Installation • DisableSynchronousTransfers - A nonzero value indicates that the SCSI host adapter is not to initiate synchronous negotiations (but it may still accept negotiations initiated by a SCSI target). The data type for this value is REG_SZ. • DisableDisconnects - A nonzero value indicates that targets are not permitted to disconnect during the execution of a SCSI command. The data type for this value is REG_DWORD. • MaximumLogicalUnit - This can limit the scan for connected devices on the SCSI bus. Valid values are 1 to 8. If 1 is specified, the Windows NT SCSI manager assumes that no SCSI targets support LUNs other than 0. Otherwise, LUNs from 0 to 8 are scanned during system initialization. The data type for this value is REG_DWORD. • Maximum SGList - Specifies the maximum number of Scatter/Gather elements. Valid values are 17-255. The data type for this value is REG_DWORD. To enter Windows NT parameters, follow these steps: 1. Select Run from the Start button. 2. Type regedt32 and press Enter. 3. Open the registry list to the following location: \HKEY_LOCAL_MACHINE\System\CurrentControlSet\ Services\adpu160m\Parameters\Device If the Parameters Device keys already exist, skip to Step 8 below to begin entering values. If the keys do not yet exist, you will need to create them by continuing with Step 4. 4. Click on the adpu160m key. 5. Select Add Key from the Edit menu; Type Parameters in the Key Name edit box. Leave the Class edit box blank. 6. Click on the Parameters key. 7. Select Add Key from the Edit menu; Type Device in the Key Name edit box. Leave the Class edit box blank. 8. To specify a certain host adapter, append Device with the number of the host adapter. For example, type Device0 for the first host adapter, Device1 for the second, etc. If you omit the host adapter number, the configuration information applies to all Ultra3 Family host adapters. 22

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Chapter 3
Microsoft Windows NT Installation
22
•
DisableSynchronousTransfers
— A nonzero value indicates that the SCSI
host adapter is not to initiate synchronous negotiations (but it may still accept
negotiations initiated by a SCSI target). The data type for this value is REG_SZ.
•
DisableDisconnects
— A nonzero value indicates that targets are not permitted
to disconnect during the execution of a SCSI command. The data type for this
value is REG_DWORD.
•
MaximumLogicalUnit
— This can limit the scan for connected devices on the
SCSI bus. Valid values are 1 to 8. If 1 is specified, the Windows NT SCSI
manager assumes that no SCSI targets support LUNs other than 0. Otherwise,
LUNs from 0 to 8 are scanned during system initialization. The data type for this
value is REG_DWORD.
•
Maximum SGList
— Specifies the maximum number of Scatter/Gather
elements. Valid values are 17-255. The data type for this value is
REG_DWORD.
To enter Windows NT parameters, follow these steps:
1. Select
Run from the Start button.
2.
Type regedt32 and press Enter.
3.
Open the registry list to the following location:
\HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Services\adpu160m\Parameters\Device
If the Parameters Device keys already exist, skip to
Step 8
below to begin
entering values. If the keys do not yet exist, you will need to create them by
continuing with
Step 4
.
4.
Click on the adpu160m key.
5.
Select Add Key from the Edit menu; Type Parameters in the Key Name edit box.
Leave the Class edit box blank.
6.
Click on the Parameters key.
7.
Select Add Key from the Edit menu; Type Device in the Key Name edit box.
Leave the Class edit box blank.
8.
To specify a certain host adapter, append Device with the number of the host
adapter. For example, type Device0 for the first host adapter, Device1 for the
second, etc. If you omit the host adapter number, the configuration information
applies to all Ultra3 Family host adapters.