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7 – Windows XP Driver Installation
System Registry Parameters
7-6 FC2354601-00 A
To change this value, follow these steps:
1. Click Start, select Run, and open the REGEDT32 program.
2. Select HKEY_LOCAL_MACHINE and follow the tree structure to the
QL2300.SYS driver:
HKEY_LOCAL_MACHINE
SYSTEM
CurrentControlSet
Services
Ql2300
Parameters
Device
3. Double-click MaximumSGList:REG_DWORD:0x21.
4. Enter a value from 16 to 255 (10h to FFh). A value of 255 (FFh) enables
the maximum 1-MB transfer size. Any value above 255 enables
64K transfers. The default value is 33 (21h).
5. Click OK.
6. Exit the REGEDT32 program, then restart the system.
7.5.2
NumberOfRequests
The NumberOfRequests registry parameter specifies the maximum number of
outstanding requests per adapter. When the QL2300.SYS driver is installed, the
registry is automatically updated with this parameter set to 150 (96h).
CAUTION!
Increasing this parameter above 150 can result in a system failure.
7.5.3
FCTape
Follow these steps to configure the QL2300.SYS driver to support FC tape:
1. Click Start, select Run, and open the REGEDT32 program.
2. Select HKEY_LOCAL_MACHINE and follow the tree structure to the
QL2300.SYS driver:
HKEY_LOCAL_MACHINE
SYSTEM
CurrentControlSet
Services
Ql2300
Parameters
Device
3. Double-click DriverParameters:REG_SZ:MSCS=2;UseSameNN=1.