SL500 - slRobotFaultLED SNMP OID Returns Opposite Value

Asset ID:	1-72-2103872.1
Update Date:	2017-05-24
Keywords:

Solution Type Problem Resolution Sure

Solution 2103872.1 : SL500 - slRobotFaultLED SNMP OID Returns Opposite Value

Applies to:

Sun StorageTek SL500 Modular Library System - Version All Versions to All Versions [Release All Releases]
Sun StorageTek SL500 Modular Library System - Version Not Applicable to Not Applicable [Release N/A]
Information in this document applies to any platform.

SL500 Firmware version 1501.

Symptoms

SL500 OID 1211.1.15.4.10.1.7.1

Returns "0" if the fault LED is on and the issue is present and "1" if the LED is not lit.

Cause

SNMP object slRobotFaultLED returns the opposite value, 0 if LED is on, 1 if LED is off.

Solution

SNMP trap like

snmpwalk -c public -v 2c <IP address> 1.3.6.1.4.1.1211.1.15.4.10.1.7.1

will return:

SNMPv2-SMI::enterprises.1211.1.15.4.10.1.7.1 = INTEGER: 1

Whilst the robot unit is working good and neither actual fault present nor fault LED is on.

It was found on a SL500 library that the SNMP trap return value will be opposite to the one that is described in SNMP guide that is applicable for sl150, sl500, sl3000, sl8500: http://docs.oracle.com/cd/E35103_07/SLESR/toc.htm

slRobotFaultLED description in a MIB file we're able to see:

slRobotFaultLED OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION "The Robot's Fault LED status off=0, on=1"
::= { slRobotEntry 7 }

It need to say that this has been discovered on fw version 1501 (7.22.00)

On the SL3000 this 1211.1.15.4.10.1.7 setting works as described in MIB or SNMP guide.

So for SL500(fw rev.1501) OID 1211.1.15.4.10.1.7.1 will return "0" if the fault LED is on and the issue is present and "1" if the LED is not lit (Robot unit seems to be good from this LED's perspective).

Brief Look on a hierarchy of the 1.3.6.1.4.1.1211.1.15.4.10.1.7.1

last (1) digit will be for robot unit number (in sl500 for example it is the only robot unit, for sl3000 this digit may be 1 and 2)

next (7) from the end digit will represent "slRobotFaultLED" Object (options available)

next (1) is SlRobotEntry (will not vary)

next (10) will identify slRobotTable family of properties (options available)

Digit (4) will stand for slPhysHardware family of properties (options available)

next (15) is "Streamline Tape Library"(no vary)

next (1) will identify "Products" (no vary)

next (1211) identifies Storagetek

and so on...

Note: We can query object ... 1211.1.15.4.10 and we'll receive full table of properties for all robots in this specific library.

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