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Oracle Tips by Burleson |
Disk I/O Tuning
Chapter 3:
HP-UX SCSI Tuning
0; 8; 1
Remember, when the system is rebooted, the HP-UX disk3 and
sdisk drivers always reset the value of the
immediate_report mode parameter to OFF. If ioctl or
scsictl is used to change the setting of
immediate reporting on a SCSI device, the new value becomes the
default setting upon subsequent configuration (e.g., opens) of this
device and retains its value across system or device powerfail
recovery. However, on the next system reboot, the
immediate_report mode parameter is reset to the value of the
tunable system parameter,
default_disk_ir.
This parameter is set in the system_file used to create the
HP-UX system by the config command.
The above text is
an excerpt from:
Oracle Disk I/O Tuning
Disk IO Performance & Optimization for Oracle
Databases
ISBN
0-9745993-4-4
by Mike Ault
Oracle Consulting
Services
Burleson
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