Power-On Self-Test; Shutdown - HP StorageWorks 7110 - Virtual Array Service Manual

Power-On Self-Test

Shutdown

36 Product Overview
Immediately after the array is powered on, the controller enclosure and disk
enclosures (VA 7400/7410 only) perform a power-on self-test.
During a power-on self-test, you will see the following front panel activity:
The system power/activity LED turns on solid green.
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The disk drive activity LEDs flash while the controller establishes
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communication with the drives, then two LEDs at a time turn on solid green,
one from the lower disk drive slots (1-8) and one from the upper disk drive
slots (9-15), while the associated drives spin up.
When the power-on self-test completes successfully:
All LEDs on the front panel should be solid green.
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The coordinated shutdown process is used to take the array offline. The
primary function of shutdown is to copy the contents of the NVRAM to the
image disks. This protects the array against data loss if a battery fails in the
absence of ac power. In the shutdown state, the array can still respond to
management commands from the host, but the host cannot access any of the
data in the array.
During shutdown, the array will use the contents of the controller NVRAM if
valid. For a dual controller configuration only a single NVRAM image is
required to be valid.
Note If the NVRAM image is not valid the array will enter an error
state. The configuration information and the write cache have
been lost. Access to the data requires a Recover process.
Recovery will attempt to recover the configuration information
from the data disks. The contents of the write cache are not
recoverable.
A shutdown is automatically initiated in two ways:
By moving the power/standby switch to the standby position.
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Using the array management software.
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