Monitoring the LRCs or ESHs

About monitoring the LRCs or ESHs

The LRC has three LEDs and the ESH has four LEDs. The LEDs common to both modules indicate whether the LRC/ESH is functioning normally or there are any problems with the hardware. The fourth LED on the ESH module indicates 2 Gb operation when lit.You can also identify any hardware failure associated with the LRCs/ESHs from the error messages displayed on your storage appliance console.

This section also describes the different types of messages that appear on the storage appliance console in response to a command monitoring the ESH.

Location of LRC/ESH module LEDs

The LRCs/ESHs are in the middle of the back of the disk shelf. The ESH module has a perforated carrier. The following illustration shows the location of the LEDs for an LRC with copper interfaces.

Note
The Fault LED is amber. The other two LEDs are green. See LED status on the LRC/ESH for an illustrated explanation of how the LEDs function.

The following illustration shows the location of the LEDs for an LRC with an optical input interface and copper output interface.

The following illustration shows the location of the LEDs for an ESH.

Note
Because LRC/ESH B on the DS14 is inverted, the location of the LRC/ESH B LEDs is the inverse of what is shown in the preceding illustrations.

LED status on the LRC/ESH

The following illustration is of the second sheet of the quick reference cards that come with your disk shelf.

Note
The rest of the second sheet of the quick reference card identifies the LED status conditions for the power supply and the integrated fan module.

LRC/ESH console error messages

The following error messages appear on your storage appliance console if an SES element on the LRC/ESH fails. For information about replacing the LRC/ESH, see Replacing an LRC/ESH.

Error message	Action required
Temperature sensor Element 2: failed	The temperature sensor on LRC module A on the top back of the disk shelf failed. Contact Network Appliance customer service to replace the LRC.
Temperature sensor Element 3: failed	The temperature sensor on LRC module B on the bottom back of the disk shelf failed. Contact Network Appliance customer service to replace the LRC.
SES electronics Element 1: component is from a different product family	This is and unsupported configuration. The shelf contains an ESH and LRC. This configuration is only supported for the process of hot upgrading from LRC to ESH
SES electronics Element 1: failed	LRC/ESH module A on the top back of the disk shelf failed. Contact Network Appliance customer service to replace the LRC.
SES electronics Element 2: failed	LRC/ESH module B on the bottom back of the disk shelf failed. Contact Network Appliance customer service to replace the LRC.
Temperature sensor Element 2: not installed or failed	Communication was possible with the temperature sensor on ESH module A at one point, but it is not possible now. Even if traffic is flowing through the Fibre Channel loop, contact Network Appliance customer service to replace the ESH.
Temperature sensor Element 3: not installed or failed	Communication was possible with the temperature sensor on ESH module B at one point, but it is not possible now. Even if traffic is flowing through the Fibre Channel loop, contact Network Appliance customer service to replace the ESH.
SES electronics Element 1: not installed or failed	Communication was possible with ESH module A at one point, but it is not possible now. Even if traffic is flowing through the Fibre Channel loop, contact Network Appliance customer service to replace the ESH.
Vendor-specific Element 1: not installed or failed
SES electronics Element 2: not installed or failed	Communication was possible with ESH module B at one point, but it is not possible now. Even if traffic is flowing through the Fibre Channel loop, contact Network Appliance customer service to replace the ESH.
Vendor-specific Element 2: not installed or failed

Monitoring the ESH

Command to use

The storage show hub command enables you to monitor the ESH.

Sample output

The following is an example of the output from the storage show hub command. The exact messages that appear on your system console depend on your system configuration.

Hub name: 9.shelf2

Channel: 9

Loop: B

Shelf id: 2

Shelf UID: 50:05:0c:c0:02:00:24:02

Term switch: ON

Shelf state: ONLINE

ESH state:   OK

Disk 
ID

Disk 
Bay

Port 
State

Loop 
up 
Count

Invalid 
CRC 
Count

Invalid 
Word 
Count

Clock 
Delta

Insert 
Count

Stall 
Count

Util %

[IN]

[32]

[33]

[34]

[35]

[36]

[37]

[38]

[39]

[40]

[41]

[42]

[43]

[44]

[45]

[OUT]

7

8

OK

OK

OK

OK

OK

OK

OK

OK

OK

OK

BYP/TBI

OK

OK

EMPTY

OK

TERM

10

10

0

0

0

0

-8

-8

-16

16

0

-8

-8

16

8

0

0

0

0

Description of hub status information

You might receive some of the following status reports in response to the storage show hub command.

Shelf state

The following table lists and describes the shelf status responses.

Shelf state	Description
ONLINE	Shelf is fully configured and operational.
INIT REQD	Shelf needs to configure one or both ESH modules.
OFFLINE	Contact was lost with shelf (SES drive access is down).
MISSING	Shelf was removed from the system entirely (all paths).
FAILED	Failure occurred on the shelf.

ESH state

The following table lists and describes the ESH status responses.

Shelf state	Description
OK	ESH is fully operational.
MISSING	ESH is missing from the specified slot.
XPORT ERROR	Communication with the ESH is not possible.

Termination (Term) switch state

The following table lists and describes the termination switch status.

Shelf state	Description
OK	Terminal switch is in the Off position. This DS14/DS14mk2 FC is connected to another DS14/DS14mk2 FC in the loop.
TERM	Terminal switch is in the On position. This DS14/DS14mk2 FC is the last shelf in the loop.
TERM-ERR	Forced termination event. The terminal switch is in the On position even though thisDS14/DS14mk2 FC is connected to another DS14/DS14mk2 FC in the loop. The ESH output port LED flashes to indicate this configuration error.
AUTO-TERM	Terminal switch is in the Off position. The output port is no longer connected to another DS14/DS14mk2 FC in the loop, but it once was. The ESH output port LED flashes to indicate this configuration error.

ESH port state

The following table lists and describes the ESH status responses.

Shelf state	Description
OK	Port is functioning normally.
EMPTY	No drive is present in bay.
BYP/TBI	Port failed loop test before insert and was not allowed into loop.
BYP/XMIT	Port bypassed due to transmitter default.
BYP/LIP	Port bypassed due to drive generating LIP F8s.
BYP/DTO	Port bypassed due to data timeout errors.
BYP/RLOS	Port bypassed due to receiver loss of signal.
BYP/CLOS	Port bypassed due to comma loss of signal.
BYP/RPRT	Port bypassed due to redundant port connection.
BYP/STALL	Port bypassed due to excessive stall errors.
BYP/WRD	Port bypassed due to excessive word errors.
BYP/CRC	Port bypassed due to excessive CRC errors.
BYP/CLK	Port bypassed due to excessive clock delta.
BYP/MIR	Port bypassed due to cluster mirror bit being set (check partner).
BYP/LIPF7	Port bypassed due to drive transmitting LIP F7s.
BYP/GEN	Port bypassed due to a "generic" error.
BYP/MAN	Port was manually bypassed (Manufacturing test only).
///:0xXX	ESH Admin unable to decode port state XX.

Hub statistic

The following table lists and describes the hub statistic responses.

Hub statistic	Description	Common values	Failure?
Loop up Count	Number of times this port saw the loop come up or transition to up.	Depends on the number of insertions and removals of disks and LIPs that occur in the loop.	No
Invalid CRC Count	Number of times this port saw a CRC error.	Is zero under normal operation. Removal and addition of disks, and a reset of the adapter, might generate some CRC errors. CRC errors on a port pinpoint the failure location. Excessive CRC errors for a continual time quantum causes the ESH firmware to bypass this port.	Yes, if drive was bypassed.
Invalid Word Count	Number of times this port saw invalid FC-AL words transmitted.	Is zero under normal operation. Removal and addition of disks, and a reset of the adapter, might generate some word errors. Word errors on a port pinpoint the failure location. Excessive word errors for a continual time quantum causes the ESH firmware to bypass this port.	Yes, if drive was bypassed.
Clock Delta	The clock delta between this port in respect to the ESH's clock and seven other ports.	It is normal for the FC-AL sync clocks to drift with respect to each other. This is a signed drift value. A value exceeding 6,400 PPM causes the ESH firmware to bypass this port.	Yes, if drive was bypassed.
Insert Count	Number of times this port was inserted into the loop.	Depends on the number of insertions and removals of disks and LIPs that occur in the loop.	No
Stall Count	Number of times this port exceeded the open/close (OPN/CLS) maximum threshold.	Is zero under normal operation. Removal and addition of disks, and a reset of the adapter, might generate some stall errors. Excessive stall errors for a continual time quantum causes the ESH firmware to bypass this port.	Yes, if drive was bypassed.
Utilization %	Relative use of this port versus other ports in the ESH.	This value does not reflect the real-time use of what the ports are currently achieving and is only obtained when extended status is available from the ESH. It indicates the relative utilization from the last time extended status was available.	No