Avago Technologies LSI20160 - Manual (Page 83)

Performance Tuning for Windows NT 4.0 4-15
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number of concurrent I/Os from the default of 32 will use increasing
amounts of nonpaged pool memory. High values for this setting can
degrade system performance.
Reboot the system for the new registry setting to be effective. To reset
the guaranteed number of concurrent I/Os to the default of 32, follow the
instructions above, and use the
SYMDEFIO.REG data file.
4.4.2.1 Auto Request Sense
Enabling and Disabling Auto Request Sense is found in Section 4.5,
“Troubleshooting.”
4.4.3 Disk Mirroring
This section applies only to Intel x86 platforms where the SDMS 4.XX
SCSI BIOS is used.
The SDMS 4.XX SCSI BIOS loads only one image into system memory
at boot time regardless of how many host adapters are used in the
system. All of the disk drives on all host adapters are recognized through
the INT13h function call. Due to this implementation, disk mirroring under
Windows NT needs to be done if it is desired. Disk mirroring allows
booting from the mirrored partition in case the primary partition fails.
Note: These instructions may be different from Microsoft
documentation.
To create an NT Fault Tolerant (FT) diskette, follow these instructions:
Step 1. Format a diskette in drive A: using NT (File Manager or
Windows Explorer) for use as a FT boot floppy.
Step 2. Copy NTLDR , NTDETECT.COM , and BOOT.INI from the root
directory of the primary partition to this diskette.
Step 3. Temporarily remove the read only attribute of the BOOT.INI file
so that it can be modified and saved.
Step 4. Edit BOOT.INI on the FT diskette and modify the following line
where you want to boot the mirrored partition.
MULTI(0)DISK(0)RDISK(X)PARTITION(Y)\
where: