Diagnostic tools

LED3 pattern	LED4 pattern	Interpretation

—	One blink every	The system is powered down, and the cache contains data that has
	two seconds	not yet been written to the drives. Restore system power as soon as
		possible to prevent data loss.
		Data preservation time is extended any time that 3.3 V auxiliary
		power is available, as indicated by LED 2. In the absence of
		auxiliary power, battery power alone preserves the data. A fully-
		charged battery can normally preserve data for at least two days.
		The battery lifetime also depends on the cache module size. For
		further information, refer to the controller QuickSpecs on the HP
		website (http://www.hp.com).
—	Double blink,	The cache microcontroller is waiting for the host controller to
	then pause	communicate.

—	One blink per	The battery pack is below the minimum charge level and is being
	second	charged. Features that require a battery (such as write cache,
		capacity expansion, stripe size migration, and RAID migration) are
		temporarily unavailable until charging is complete. The recharge
		process takes between 15 minutes and two hours, depending on the
		initial capacity of the battery.
—	Steady glow	The battery pack is fully charged, and posted write data is stored in
		the cache.

—	Off	The battery pack is fully charged, and there is no posted write data
		in the cache.

One blink per	One blink per	An alternating green and amber blink pattern indicates that the
second	second	cache microcontroller is executing from within its boot loader and
		receiving new flash code from the host controller.

Steady glow	—	There is a short circuit across the battery terminals or within the
		battery pack. BBWC features are disabled until the battery pack is
		replaced. The life expectancy of a battery pack is typically more
		than three years.

One blink per	—	There is an open circuit across the battery terminals or within the
second		battery pack. BBWC features are disabled until the battery pack is
		replaced. The life expectancy of a battery pack is typically more
		than three years.

Several diagnostic tools provide feedback about problems with arrays. The most important are:

•ADU

This utility is a Windows®-based diagnostic tool that sends an email to HP Support when it detects any problems with the controllers and attached storage in a system.

You can install ADU from the Smart Setup media. When installation is complete, run ADU by clicking Start and selecting Programs>HP System Tools>HP Array Diagnostic Utility.

The meanings of the various ADU error messages are provided in the HP Servers Troubleshooting Guide.

•POST messages

Smart Array controllers produce diagnostic error messages at reboot. Many of these POST messages are self-explanatory and suggest corrective actions. For more information about POST messages, refer to the HP Servers Troubleshooting Guide.

Diagnosing array problems 36