Western Digital Ultrastar ScaleUp SE4U102 User Manual page 227

User Guide
Step 4 : Issue the following command to activate IOM A:
sg_ses <dev> -p4 -c -d 02,00,01,00
Step 5 : Ensure Windows MPIO can see all paths to the drives after activating IOM A.
a. Execute the following command:
C:\mpclaim.exe –v C:\Users\Administrator\Desktop\mpclaim_output.txt
b. Verify there are two paths to each drive by issuing the following command:
C:\more C:\Users\Administrator\Desktop\mpclaim_output.txt
c. Verify that the output from the mpclaim_output.txt output appears similar to the following
example.
0000000077010524 Active/Optimized 001|005|036|000 0 Adapter: Avago
Adapter, SAS3 3008 Fury -StorPo... (B|D|F:
134|000|000) Controller: 46616B65436F6E74726F6C6C6572 (State: Active)
0000000077000431 Active/Optimized 000|004|049|000 0 Adapter: Avago
Adapter, SAS3 3008 Fury -StorPo... (B|D|F:
132|000|000) Controller: 46616B65436F6E74726F6C6C6572 (State: Active)
MPIO Disk98: 02 Paths, Least Blocks, ALUA Not Supported SN:
5000CCA2532558CC
Supported Load Balance Policies: FOO RR RRWS LQD WP LB Path ID
State SCSI
Address Weight
-------------------------------------------------------------------
0000000077010523 Active/Optimized 001|005|035|000 0 Adapter: Avago
Adapter, SAS3 3008 Fury -StorPo... (B|D|F:
134|000|000) Controller: 46616B65436F6E74726F6C6C6572 (State: Active)
0000000077000430 Active/Optimized 000|004|048|000 0 Adapter: Avago
Adapter, SAS3 3008 Fury -StorPo... (B|D|F:
132|000|000) Controller: 46616B65436F6E74726F6C6C6572 (State: Active)
MPIO Disk97: 02 Paths, Least Blocks, ALUA Not Supported SN:
5000CCA253255E9C
Supported Load Balance Policies: FOO RR RRWS LQD WP LB Path ID
State SCSI
Address Weight
-------------------------------------------------------------------
download microcode expected buffer id offset: 0
Note: Only activate one IOM at a time to ensure there is always at least one path
to the drives to service I/O while an IOM is being reset. The user will need to
issue a reset command to each IOM to activate the firmware using an sg_ses
command to ensure this occurs properly.
Note: It could take the OS several minutes to rebuild all the paths to the
drives depending on the workload on the drives and how busy the host is.
Multipathing may have to be verified several times to ensure that all paths are
in an optimal state following the reset of IOM A.
4. Management
4.3 Firmware Upgrade
211