Chapter 4: Subsystem Operation and Monitoring
Status Indicating LEDs
4-11
There 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.
You may also jot down the configured 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 the button for two seconds for the functionality to
take effect.
4.4.7 LAN Port LEDs
The LAN port comes with two (2) LEDs. As shown in
Figure 4-6
, one LED
indicates the online status and the other indicates LAN activity. The LED
definitions are shown in
Table 4-5
.
