Chapter 1: Introduction
1. Before pressing this button to restore firmware defaults, it is
highly advised to make a list of the existing ID/LUN mapping
information. You will need the list for restoring ID/LUN
mapping after restoring defaults. Default restoration will erase
the ID/LUN mapping associations (e.g., which logical drive is
associated with which host ID/LUN), and it is necessary to
restore the host ID/LUN mapping after firmware default
restoration in order to access data on the previously configured
arrays.
2. Some of the latest firmware updates may be incompatible with
the firmware currently running on your subsystem. These
updates may require restoring firmware defaults before
firmware upgrade can actually take place. Before using the
button, it is highly advised to practice the following:
Stop host I/Os,
Backup your data,
Make a list of host ID/LUN mapping
information for future references.
It is also recommended to keep a record of all
configuration parameters such as the
performance preferences, specific stripe sizes,
etc.
3.
The no. 3 condition that requires restoring defaults is when an
administrator forgets the password configured to control the
access to a RAID subsystem. Before pushing this button, also
practice the steps listed above. You can access array
information even without a password.
How to use the button?
After the subsystem is powered down, you can use a straighten paper-clip
to press the button. Press and hold the button down, power on the
subsystem, and wait for the associated LED and the subsystem Ready LED
to light up. The “Restore Def.” LED indicates successful restoration of
firmware defaults.
With redundant RAID controllers, the procedure can be tricky:
Step 1. Remove one controller from the subsystem, power down,
and then power on with the “Restore Def.” button depressed
to restore the firmware defaults on the remaining controller.
Step 2. Power down, install the controller previously removed, and
repeat the restoration process.
Step 3. When completed with restoring defaults on both controllers,
install both controllers and power on.
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