Installation manual

10
1.1 Celerity and ThunderLink FC NVRAM Settings
The settings in the NVRAM tab vary depending upon the selected Celerity or ThunderLink Fibre Channel storage
controller and the operating system. Settings unsupported by that OS are not displayed.
ATTO storage controllers are designed to operate
properly using factory settings. Entering invalid or
incorrect settings when using an NVRAM
configuration utility such as the ATTO ConfigTool may
cause your storage controller to function incorrectly.
CAUTIONCAUTION
Back up system data when installing or
changing hardware configurations.
Use caution when making changes to NVRAM
settings and only make changes to those with which
you are familiar. Once you have made the desired
changes, click
Commit to save the changes.
Changes do not take effect until you reboot the
system.
If you do not want to make any changes, you may
choose one of the following:
• Defaults: restores the storage controller to
factory default settings. The Commit button
must be clicked to save any changes.
• Restore: reverts to the NVRAM settings saved
the last time the Commit button was used.
Clicking Commit is not necessary.
Node Name
The Node WWN assigned to this channel of the storage
controller.
Port Name
The Port WWN assigned to this channel of the storage
controller.
Boot Driver
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 storage controller
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.
Hard Address Enable Button
Choices: enabled, disabled
Default: disabled
When a Fibre Channel loop is initialized, each device
selects and configures itself to an available ID.
Hard
Address Enable
permits the host to select the value
entered in the
Hard Address field.
Hard Address
Choices: None, 0-125
Default: 0
The value used as the FC-AL hard address. A value to
represent the address if hard addressing is enabled.
Execution Throttle
Choices: 1- 255
Default: 32
Specifies the maximum number of concurrent commands
which can be achieved per port or per LUN. Increasing
this value may increase performance, but too many
concurrent commands can saturate a drive, ultimately
decreasing performance.
Note
This is only honored by the StorPort version
of the Windows driver. 8 Gig requires version
1.10 or later, while 4 Gig requires 2.64 or
later.
Frame Size
Choices: 512, 1024, 2048
Default: 2048
Changes the size of the FC packet of information being
sent. Typically, the initiator and target negotiates the
desired frame size, starting with the largest value. The
frame size should be set to the largest value for normal
operation.
Device Discovery
Choices: Node WWN, Port WWN
Default: Port WWN
Specifies the type of device discovery the storage
controller performs. Use the
Port WWN when the
storage controller requires separate paths to a device and
the device is dual ported. A dual ported device has one
path when the
Node WWN is specified and two paths
when the
Port WWN is specified.