After the storage system is installed and connected and the device files have been created, the AIX® system sets the device parameters to the system default values. If necessary, you can change the read/write time-out, queue type, and queue depth parameters for each new device using the System Management Information Tool (SMIT) or the AIX® command line).
When you set parameters for the FX devices and SCSI disk devices, use the same settings and device parameters for all storage system devices.If you installed the ODM update, skip this section and go to Assignment of new devices to volume groups and setting partition sizes for AIX.
The following table specifies the read/write time-out and queue type requirements for the devices.
| Parameter Name | Default Value | Requirement |
|---|---|---|
| Read/write time-out | 30 | 60 |
| Queue type | none | simple |
You can adjust the queue depth as needed to optimize the I/O performance of the devices. For details, see Host queue depth.