82

Troubleshooting

Management or use the appropriate CLI commands

If a drive fails to respond

• Determine which drive has failed by observing
the amber fault LED on the drive sled or connect
to the CLI and type

driveinfo

for a list of all drives
and their status.
• For specific information on a particular drive in
CLI, type driveinfo [sled number] [drive

number]

.

Record all errors.
• Determine if the drive is configured in JBOD,
RAID Level 0 or RAID Level 1.
• Follow the instructions in the appropriate
chapters of this manual for removing,
replacing and reconfiguring the drive (refer to

Hot Swap Operating Instructions on page 87

)
• You may copy drives by using CLI commands.
(refer to

Copying Drives

on page 73 and

Drive

Configuration Commands

on page 43).

If a power supply fails

• Verify the power cord is correctly plugged and
there is power at the power receptacle.
• If there is power, the cord is secure and the
blower and power supply LEDs are off, replace
the blower unit (refer to

Hot Swap Operating

Instructions on page 87

).
• If there is power, the cord is secure and the
power supply LED is off, but the blower LED is
on, replace the power supply (refer to

Hot Swap

Operating Instructions on page 87

)
• Command Overlap: The array contains special
software to take advantage of the Command
Overlap feature offered in some high
performance disk drives. Because all 24 disk
drives in a array may be seeking at the same
time under Command Overlap, only arrays with
two operational power supplies and blower
assemblies supports Command Overlap: the
array automatically disables the Command
Overlap feature if a power supply fails and
notifies the system administrator through the
audible alarm and CLI.
If you cannot read or write to the array:
You m a y have lost connection to the host via the Host Interface Card. The Host Interface Card LED on the back of the array should be lit green. The amber LED should go out and the green LED should light when the connection is complete.Also check the host bus adapter (HBA) in the host machine for proper functioning and drivers.
• Verify that the connector and both ends of the
cable are completely seated.
• Try connecting directly to the host, bypassing
any hubs or switches.

To determine if the problem exists with the Host

Interface Card or the connection

• Swap the cable from one HIC to the other HIC.
• If the LED is now green, swap the cable back to
the original HIC. If the LED is amber, the HIC is
defective.
• Swap the defective HIC (refer to

Hot Swap

Operating Instructions on page 87

).

If you can’t access the array CLI via Ethernet

• Verify there are three or fewer concurrent
sessions using Telnet or FTP. You may be the
fourth session or someone in another session
has entered a command which requires a

SaveConfiguration

command.
• Verify you are using a crossover cable for direct
connection, or a network cable for a network
connection.
• Verify the array is set to IPDHCP enabled if you
expect an IP address will be assigned by the
network and DHCP is an option available on the
network.
• Verify the IP address is compatible with the host
machine.
• Verify the system is functioning and accessible
via in-band inquires such as Disk Management.
• Try setting your terminal emulator with a
different baud rate, starting at 2400, then 9600,
19200, 38400, 57600, and 115200.
• If you perform a hardware restart, the Ethernet
connection is dropped. You must re-establish
the Ethernet connection.
• If you enter a command that requires a
SaveConfiguration command in either the
serial interface window or the Ethernet
connection window, you cannot not be able to
access the inactive window until the
SaveConfiguration command is complete in the
active window.
• If you still fail to communicate with the array,
swap out the management card and try to
connect using default settings.

If you do not see the appropriate number of

LUNs on the host machine

• Ensure any configuration changes are
appropriate
• Type FirmwareRestart in CLI
• Re-start the host computer
• Verify all drives associated with the missing
LUN(s) are inserted properly and powered up.