User Guide
4. Management
4.4 Firmware Auto-Sync
Introduced with firmware version 3000-058, Auto-Sync is a feature that automatically detects a mismatch
of SEP and OOBM firmware between an enclosure's two IOMs and initiates an upgrade or downgrade to
synchronize the firmware versions. This feature is designed to reduce the time required to update firmware
after replacing one or both IOMs and can be utilized to achieve different outcomes depending on the
user's needs. The following sections define use cases of this feature, requirements for its operation, and
procedures for enabling and disabling it.
Single IOM Replacement
After removing one IOM from a powered-up enclosure, or booting an enclosure with only a single IOM, the
firmware on the installed IOM (if v3 or higher) will become dominant. If a second IOM with different firmware
is then installed, the enclosure will detect the mismatch and either upgrade or downgrade the firmware on
the second IOM to match the first.
Dual IOM Replacement
After booting an enclosure with two installed IOMs, the highest version of IOM firmware will become
dominant. The firmware on the other IOM will be upgraded to match.
Feature Requirements
•
The dominant IOM must be running SEP firmware version 3xxx or higher and OOBM firmware 3.x.x or
higher. This firmware bundle is collectively referred to as "v3".
•
The non-dominant IOM must be running SEP firmware version 2020 or higher.
•
The enclosure must have the Auto-Sync VPD bit enabled.
•
To enable and disable the Auto-Sync VPD bit, the host must have the sg3_utils package installed:
http://sg.danny.cz/sg/sg3_utils.html
.
Restrictions
•
Auto-Sync will not be operational when a manual firmware upgrade is in progress.
•
Manual firmware upgrade will not be available when an Auto-Sync firmware upgrade is in progress.
4.4.1
Enabling Auto-Sync
Step 1 :
Follow the instructions in the
section to download the v3
firmware bundle to the dominant IOM and activate it.
Step 2 :
From a host command line, use the
sg_modes
utility to verify that the enclosure's Auto-Sync VPD
bit is currently
disabled
(00, bold in the following example):
sg_modes <dev> --page=0x20 --llbaa
HGST H4102-J 3010 peripheral_type: enclosure services device [0xd]
Mode parameter header from MODE SENSE(10):
Mode data length=24, medium type=0x00, specific param=0x00, longlba=0
Block descriptor length=0
>> page_code: 0x20, page_control: current
00 a0 0e 01 00 00 00 00 00 00 00 00 00 00 00 00 00
Step 3 :
Use the
sg_wr_mode
utility to
enable
the enclosure's Auto-Sync VPD bit:
213
