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Verify that the latest version of the computer BIOS is installed. Use caution
when updating the computer's BIOS. A mistake could leave the system in an
unusable state.
Remove any non-vital PCI controllers from the system to determine if there is a
PCI bus conflict.
Disconnect any SAS/SATA devices from the controller and reboot the computer.
If this resolves the issue, investigate the SAS/SATA cable or SAS/SATA target
devices as described in the section below.
If the computer still does not boot, try installing the controller in a different
computer. If the controller works in the new computer, try updating the flash on
the controller as described in the "Installation and Operations" manual. Then try
it again in the original computer.
o If it still fails, report this as a possible interoperability issue between the
controller and the computer.
o If the problem follows the controller, replace it with a new adapter.
The computer freezes when the ATTO Banner is displayed during the system
BIOS scan.
Disconnect all devices from the SAS controller and reboot the system.
If the system still freezes:
Remove any non-vital PCI controllers from the system to determine if there is a
PCI bus conflict.
Remove the SAS controller and test it in a different computer (not the same
model). If the controller works properly, enter the ATTO ExpressSAS Utility
during the system BIOS scan by hitting Control-Z when prompted. Enter the
controller configuration menu and disable the BIOS. There may be a BIOS
conflict between the ATTO controller and the original computer. Place the
controller back into the original machine and reboot.
If this resolves the issue, report this is as a BIOS conflict. Note that you
can continue to operate. Disabling the BIOS will only prevent the
computer from booting from an external drive connected to the controller.
If the computer still hangs, replace the controller with a new one.
If the system no longer freezes after disconnecting the SAS/SATA devices:
Check the SAS/SATA devices. Check for fault lights on the drives.
Check cable integrity. Check the cables for solid connections. Make sure they
are snapped in. Inspect cable ends for bent pins or faulty gold fingers.
Try attaching SAS/SATA devices one at a time with different cables, adding
drives and cables until the problem occurs. This will help pinpoint the device or
cable causing the problem.
Watch the LED indicators on the SAS/SATA devices before, during, and after
startup. Drive lights should also flash at startup as the SAS/SATA bus is
scanned. This may give a clue as to the root cause of the issue.
Page 2 of 9
Atto Technology, Inc.
June 6, 2007