Chapter 1: Introduction
The “Restore Default” button is a non-latch type push button
accessed through a round opening near the Restore Default
LED.
Listed below are the necessary procedures that should
be completed before using this button:
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. You may also use the Save NVRAM firmware function to
keep a configuration profile.
3. 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,
Save NVRAM or manually 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.
4. 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:
Major Subsystem Components
1-11
