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CAUTION: Set the initiator ID on a SCSI adapter carefully. Duplicate SCSI IDs on a SCSI bus
can result in bus hangs, system hangs, and system panics. The mptconfig command will attempt
to verify that no targets are using the specified ID before the change is allowed; however, in the
case of multi-initiator (shared bus) configurations, the mptconfig command cannot detect the
presence of other initiators on the SCSI bus. Use the ioscan command on any servers connected
to the same SCSI bus to verify that the init_id selected is free, before using the mptconfig -i
option.
NOTE: The In Use Device column is only displayed on systems running HP-UX 11i v3.
Using Common mptconfig Command Line Options
This section lists the mptconfig command line options to change common A7173A SCSI settings
online:
• Use the -r option on the mptconfigcommand to change the transfer rate for the A7173A
adapter. For example:
# mptconfig -r ultra160 /dev/mpt14
Confirm: Do you want to change scsi parameters (y/[n]): y
Status .................................. [Successful]
#
• Use the -w option on the mptconfig command to change the SCSI bus width. For example:
# mptconfig -w narrow /dev/mpt14
Confirm: Do you want to change scsi parameters (y/[n]): y
Status .................................. [Successful]
#
• Use the -t option on the mptconfig command to change the SCSI ID of SCSI target devices
that do not automatically configure SCSI IDs.
NOTE: In most cases, target device SCSI IDs are set automatically by the storage enclosure
or by a switch on the storage enclosure. See the documentation for the peripheral device to
determine how to set its SCSI ID.
• Use the -d option on the mptconfig command to set the SCSI parameters on the A7173A
adapter to the default values. For example:
# mptconfig -d /dev/mpt14
Confirm: Do you want to change scsi parameters (y/[n]): y
Scan For Devices to avoid id conflict ... [Passed]
Changing SCSI Bus Parameters ............ [Passed]
Status .................................. [Successful]
#
Setting and Confirming SCSI Parameters Online 43