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J2012-01User Manual
Chapter 3 Sub-system Configuration Setup
3.6.5.6 How to enable/disable the enclosure alarm by your software
Enclosure control element
BYTE/BIT
7
6
5
4
3
2
1
0
0
COMMON CONTROL
SELECT
PRDFAIL DISABLE
RST SWAP
Reserved
1
RQST
IDENT
Reserved
2
POWER CYCLE
REQUEST
POWER CYCLE DELAY
3
POWER OFF DURATION
REQUEST
FAILURE
REQUEST
WARNING
The system alarm LED is used for the enclosure alarm and power alarm. The "REQUEST
FAILURE" and "REQUEST WARNING" for Enclosure are defined in the bit1, byte3 and bit0,
byte3 of the "Enclosure control element" in the SES specification. Setting either bit can enable
the enclosure alarm. Clearing both bits disables the enclosure alarm. We use the software
package "sg3_utils" on Linux for example, and have a SAS HBA and a cable to connect your
host with the expander.
(A) Show the device for AIC Expander Controller (canister)
$ sg_map -i
/dev/sg2 AIC 12G 2U12SAS3swap 0c01
(B) Enable the enclosure alarm
$ sg_ses --descriptor=EnclosureElement01 --set=3:1:1 /dev/sg2
or
$ sg_ses --descriptor=EnclosureElement01 --set=3:0:1 /dev/sg2
(C) Disable the enclosure alarm
$ sg_ses --descriptor=EnclosureElement01 --clear=3:1:1 /dev/sg2
and
$ sg_ses --descriptor=EnclosureElement01 --clear=3:0:1 /dev/sg2
