AIC 12Gb/s SAS JBOD Series, User Manual, Page: 60 / 105

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J4024-01 User Manual Chapter 3. Sub-system Configuration Setup
3.6.5.3 How to power off/on all disk drives on a disk backplane manually
Power Supply 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 Reserved
3 Reserved RQST FAIL RQST ON Reserved
The "RQST ON" for Power Supply is defined in the bit5, byte3 of the "Power Supply
control element" in the SES specification. Clear the bit on Power Supply Element
“DiskPowerSupply” to power off all disk drives. Set the bit on Power Supply Element
“DiskPowerSupply” to power on all disk drives. 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) on a disk backplane
$ sg_map -i
/dev/sg2 AIC 12G 4U24SAS3swap 0c01
(B) Power off all disk drives on the disk backplane
$ sg_ses --descriptor=DiskPowerSupply --clear=3:5:1 /dev/sg2
(C) Power on all disk drives on the disk backplane
$ sg_ses --descriptor=DiskPowerSupply --set=3:5:1 /dev/sg2