HP ProLiant ML150

Installing and Configuring
• QAS—(Default: Yes) QAS speeds up the arbitration process by eliminating the bus free
phase. Combined with packetization, this significantly improves bus efficiency.
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Initiate Wide Negotiation—(Default: Yes) When set to Yes, the SCSI host bus adapter
attempts 16-bit data transfer (wide negotiation). When set to No, the SCSI host bus
adapter uses 8-bit data transfer unless the SCSI device requests wide negotiation.
NOTE: Set Initiate Wide Negotiation to No if you are using an 8-bit SCSI device that hangs or exhibits
other performance problems with 16-bit data transfer rate enabled.
Enable Disconnection—(Default: Yes) When set to Yes, allows the SCSI device to
disconnect from the SCSI bus. Leave the setting at Yes if two or more SCSI devices are
connected to the SCSI host bus adapter. If only one SCSI device is connected, changing
the setting to No results in slightly better performance.
Send Start Unit Command—(Default: Yes) When set to Yes, the Start Unit Command
is sent to the SCSI device at bootup. The following three options have no effect when the
SCSI host bus adapter BIOS is disabled. (The SCSI host bus adapter BIOS is normally
enabled by default.)
Include In BIOS Scan—(Default: Yes) Determines if the BIOS will scan for SCSI
devices.
The following option has no effect when the SCSI host bus adapter BIOS is disabled. (The
SCSI host bus adapter BIOS is normally enabled by default.)
BIOS Multiple LUN Support—(Default: No) Leave this setting at No if the device does
not have multiple Logical Unit Numbers (LUNs). When set to Yes, the SCSI host bus
adapter BIOS provides boot support for a SCSI device with multiple LUNs (for example,
a CD “juke box” device in which multiple CDs can be accessed simultaneously).
Advanced Device Configuration
NOTE: Do not change the Advanced Device Configuration options unless absolutely necessary.
Reset SCSI Bus at IC Initialization—(Default: Enabled) When set to Enabled, the
SCSI host bus adapter generates a SCSI bus reset during its power-on initialization and
after a hard reset.
Display <Ctrl> <A> Messages During BIOS Initialization—(Default: Enabled) When
set to Enabled, the SCSI host bus adapter BIOS displays the
Press <Ctrl> <A> for SCSISelect (TM) Utility!
message on your screen during system bootup. If this setting is disabled, you can still
invoke the SCSISelect Utility by pressing the Ctrl -A keys after the SCSI host bus
adapter BIOS banner displays.
HP ProLiant ML150 Server Operations and Maintenance Guide 2-43
HP CONFIDENTIAL Codename: Stone Soup Part Number: 343329-001 Last Saved On: 8/14/03 10:09 AM