To tune SCSI cards on HP/UX

To tune SCSI cards on HP/UX go into the BCH (Boot Console Handler) SERvice menu and use the SCSI command.
Service Menu: Enter command > help scsi
------- SCSI Help -------------------------------------------------------------
SCSI displays the SCSI controller parameters. SCSI is also
used to set parameters for a SCSI controller at a specified path.
These parameters are used by the operating system SCSI driver.
If a parameter is set to Unknown or a path is not in the table,
a firmware suggested SCSI controller parameter is used by the
SCSI driver. The firmware suggested value for the initiator id is 7.
An exception is for the termination. If the SCSI card does not support
SCSI Parameters, then the TERM setting will be displayed as UNKNOWN.
In this case, the termination is not programmatically controlled.
SCSI Display all SCSI controller parms
SCSI Display SCSI control parms specific path
SCSI INIT Set initiator id for specified path
SCSI RATE Set transfer rate for specified path
SCSI TERM Set auto term for specified path
SCSI WIDTH Set bus width for specified path.
SCSI DEFAULT Set a specific path to use default parms
SCSI DEFAULT Set SCSI devices to use default parms.
is in I/O notation, such as 1/2/3/4 (SBA/LBA/DEV./FUNC.)
is an integer in the range 0..15 Default: 7
= SLOW, FAST, ULTRA, ULTRA2, ULTRA160, ULTRA320,
or NOLIMIT (where NOLIMIT means use max) Default: max
is either 0, 8, or 16 (where 0 means use max) Default: max
is either ON, OFF, or DEFAULT Default: ON
Short Command for SCSI: SCSI