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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

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Burleson Oracle Consulting offers Senior Oracle consultants which are available for all areas of Oracle support.  Common Oracle consulting support activities include short-term Oracle tuning, Oracle database troubleshooting, Oracle9i and Oracle10g migration, Oracle9iAS App Server consulting, Oracle design reviews and Oracle requirements evaluation support. Oracle support and Oracle consulting services are priced by the hour, so you only pay for what you need. These one-time Oracle consulting services commonly include:

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