IBM PCI Dual Channel Ultra3 SCSI Adapter, Installation And Using Manual

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If you were not successful using the procedure discussed in “Enable Ultra Speed (on
External Devices) during Single-Ended Operation” on page 17, do the following:
1. Select Apply change to DATABASE only.
2. Press F4 and select yes.
3. Press Enter.
4. Press F10 to exit SMIT.
5. At this point, adapter and child devices must be reconfigured. To reboot your
system, type
shutdown -Fr
at the command prompt.
Limit Adapter Speed
You can limit adapter speed by changing the maximum synchronous data-transfer rate.
To limit adapter speed, do the following:
1. At the command prompt, type
smitty scsia
, and press Enter.
2. Select Change / Show Characteristics of a SCSI Adapter.
3. Select your adapter from the list.
Note: For an example, see step 3 on page 16.
4. Select Maximum synchronous data transfer rate (MHz).
5. Press F4.
6. Select the desired rate: 5, 10, 20, or 40 million data cycles per second, and press
Enter.
7. Press Enter again.
8. If the change was successful, press F10 to exit SMIT.
If you were not successful using the “Limit Adapter Speed” procedure, do the following:
1. Select Apply change to DATABASE only.
2. Press F4 and select yes.
3. Press Enter.
4. Press F10 to exit SMIT.
5. At this point, adapter and child devices must be reconfigured. To reboot your
system, type
shutdown -Fr
at the command prompt.
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Installation and Using Guide