Chapter 1: Introduction
Major Subsystem
Components
1-11
LED indicators:
Each controller’s interface faceplate comes with
numerous LED indicators. Please refer to
Chapter 4
for information on
the LED definitions.
Restore Default Button/LED:
Pressing the “restore default button”
while powering on the subsystem will restore firmware defaults.
CAUTION!
The Restore NVRAM Default push button is a function that carries some
risks. Firmware restoration will not destroy the existing logical drive
configurations; however, if the existing logical drives cannot be
adequately associated with host ID/LUNs after firmware default
restoration, data loss or inconsistencies may occur.
The “Restore Default” button is a non-latch type push button
accessed through a round opening underneath 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.
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., using the
“
Save NVRAM
” firmware function.
3.
Another 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