Installation manual

75 ATTO Technology Inc. ATTO Utilities Installation and Operation Manual
2.2 SCSI BIOS Configuration Utility
The default NVRAM settings work for most applications, but your particular hardware configuration may require
some changes.
SCSI storage controller NVRAM settings may be
changed from the BIOS Configuration Utility.
The default NVRAM settings work for most
applications, but your particular hardware
configuration may require some changes.
Select the Adapter Menu and the following menu
displays:
Select Adapter Channels
Configure Adapter Channels
Selectable Boot Device
Update Flash ROM
Configuring adapter channels
The Configure Adapter Channels menu displays
the parameters which are managed for the specific
adapter. The parameters available vary by SCSI family
and the specific adapter within a family.
Bus Reset Delay
Choices: 0-255 (seconds)
Default: 3
Sets the time delay between the reset of the SCSI bus
and the scanning of the SCSI bus. You may need to
modify if devices require a longer time to respond
following reset.
Channel Number
Choices: Variable
Default: 0
Choices depend upon the number of ExpressPCI
adapters installed in your computer and the number of
channels per adapter. If one single channel ExpressPCI
adapter is installed,
0 is the only choice. If two dual
channel adapters are installed, choices are
0, 1, 2 and 3 .
Firmware Version
Displays the version of firmware loaded in onboard flash.
BIOS
Choices: enabled, scan only, disabled
Default: disabled
If enabled and disk drives or a bootable CD are detected
during the bus scan, the BIOS driver remains resident. If
disabled, the BIOS starts, resets the adapter chip and
unloads the driver.
If
Scan Only is selected, the BIOS driver scans the bus
and displays the devices attached, then unloads itself
after a brief delay.
Initiator ID
Choices: 0-15
Default: 7
The ExpressPCI SCSI adapter is normally set to SCSI ID
7 because ID 7 has the highest priority on the bus. The
setting should remain at ID 7 unless you are instructed to
change it by an ATTO technical support representative.
Interrupt Level
Displays the interrupt level assigned by the BIOS to the
adapter.
I/O Address
Displays the PCI I/O memory address assigned by the
BIOS to the adapter.
Max Single-Ended Sync Rate
Choices: Variable by adapter type
Default: 20 (Narrow)/40 (Ultra/Wide)
Specifies the maximum synchronous transfer rate to be
negotiated when the adapter detects a Single-Ended
SCSI bus. The bus is Single-Ended when UltraSCSI
devices are connected to the bus.
PCI Burst Size
Choices: disabled, 8, 16, 32, 64, 128, 256 or 512 bytes
Default: 512 bytes
Sets the burst rate threshold for SCSI operations when
moving data across the PCI bus.
PCI Bus Parity
Choices: Yes, No
Default: Yes
Indicates if an interrupt should be generated for a PCI
Bus Parity error. If you choose
Yes , the interrupt is
generated.