Western Digital Ultrastar Data60 User Manual page 180

User Guide
Step 5 : Issues the following command to activate IOM A:
sg_ses <dev> -p4 -c -d 02,00,01,00
Step 6 : Ensure multi-pathing can see all of the expected drives after activating IOM A.
a. Execute the following command to verify that there are two paths to each drive:
Step 7 : Issues the following command to activate IOM B:
sg_ses <dev> -p4 -c -d 02,00,01,01
Step 8 : Ensure multi-pathing can see all of the expected drives after activating IOM B.
a. Execute the following command to verify that there are two paths to each drive:
b. Verify that there are two paths to each drive.
Attention: If the OOBM is not being used, query Page Eh by executing the
following command
sg_ses <device> -p0xe
issued, the output may be inaccurate, please ignore and issue the command
again. The string to observe for download microcode status is "Complete, no
error, start after hard reset or power cycle [0x11]" before proceeding to the
activate step.
Example output:
sg_ses <dev> -p 0xe
HGST H4060-J 2033
Download microcode status diagnostic page:
number of secondary subenclosures: 0
generation code: 0x0
subenclosure identifier: 0 [primary]
download microcode status: Complete, no error, start after
hard reset or power cycle [0x11]
download microcode additional status: 0x0
download microcode maximum size: 1703914 bytes
download microcode expected buffer id: 0x0
download microcode expected buffer id offset: 0
Note: Activate only one IOM at a time to ensure there is always at least one
path to the drives. The user will need to issue a reset to each IOM to activate
the firmware using an sg_ses command to ensure this occurs properly.
multipath -ll | grep -i "active ready running" -c
multipath -ll | grep -i "active ready running" -c
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 B.
5. System Management
5.1 Firmware Upgrade
. The first time this command is
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