HP A6829A PCI Dual Channel Ultra160 SCSI Host Bus Adapter Service and User Guide (May 2003)

Installing the A6829A Adapter
Specifying SCSI Parameters
Chapter 2 33
In this example, the HBA’s maximum data transfer rate for channel A
is MAX (shown in bold in the previous listing, for highlighting
purposes). As mentioned earlier, this is the firmware suggested
default setting, and it allows the A6829A’s maximum data rate (160
MB/s) to be used.
If you want to retain the maximum data transfer rate, type main to go
back to the “Main Menu”.
If you want to change the data transfer rate (for example, to
troubleshoot communications between the adapter and an
Ultra-capable SCSI disk), go to step c.
c. If you are still in the “Service Menu,” type the following command:
scsi path rate new_data_rate
where, path is the HBA’s path and new_data_rate is what you want
to change the HBA’s maximum data transfer rate to (ULTRA, for this
example).
Therefore, using the information for the HBA in step b, type the
following:
scsi 0/0/10/0/0 rate ultra
This changes the HBA’s maximum data transfer rate to ULTRA (40
MB/s).
To ensure that the data transfer rate has changed, you can repeat
step b to display the HBA’s transfer rate.
When your troubleshooting is complete, and you want to change the
adapter’s transfer rate back to MAX, go to step d.
d. If you are still in “Service Menu”, type the following command:
scsi path rate new_data_rate
where, path is the HBA’s path and new_data_rate is what you want
to change the HBA’s maximum data transfer rate to (MAX, for this
example).
Therefore, using the information for the HBA in step c, type the
following:
scsi 0/0/10/0/0 rate nolimit
This changes the HBA’s maximum data transfer rate back to MAX (160
MB/s).