HP P4000 HP Smart Array SAS controllers for Integrity servers support guide - Page 23

Flash-Backed Write Cache (FBWC) LEDs, Fault management features

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Table 1-12 Interpreting battery pack LEDs (continued) LED 3 State -- -- One flash per second LED 4 State Steady glow Off One flash per second Steady glow -- One flash per -second Interpretation The battery pack is fully charged, and posted write data is stored in the cache. The battery pack is fully charged, and there is no posted write data in the cache. An alternating green and amber flash pattern indicates that the cache microcontroller is executing from within its boot loader and receiving new flash code from the host controller. There is a short circuit across the battery terminals or in 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. There is an open circuit across the battery terminals or in 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. Flash-Backed Write Cache (FBWC) LEDs The FBWC module has two single-color LEDs (green and amber). The LEDs are duplicated on the reverse side of the cache module to facilitate status viewing. Table 1-13 Flash-Backed Write Cache LEDs Green LED Amber LED Off On Flashing (1 Hz) On Flashing (1 Hz) Off On Off Flashing (2 Hz) Flashing (2 Hz) Alternating with Alternating with amber LED green LED Interpretation A backup is in progress. A restore is in progress. The capacitor pack is charging. The capacitor pack has completed charging. One of the following conditions exists: • The charging process has timed out. • The capacitor pack is not connected. On On Off Off The flash code image failed to load. The flash code is corrupt. Fault management features The Smart Array Controllers and the HP-UX operating system support the following fault management and data reliability features that minimize the impact of disk drive defects on your systems: Auto-Reliability Monitoring (ARM) A firmware process that operates in the background, scanning physical disks for bad sectors in fault-tolerant logical drives. ARM also verifies the consistency of parity data in logical drives that use RAID 5 or RAID ADG. This process assures that you can recover data successfully if a disk fails. ARM operates when you select a fault-tolerant configuration. Dynamic sector repair Automatically remaps any sectors that have media faults detected during normal operation or by Auto-Reliability Monitoring. S.M.A.R.T. An industry-standard diagnostic and failure prediction feature of physical disks, developed by HP in collaboration with the disk drive industry. S.M.A.R.T. monitors factors Flash-Backed Write Cache (FBWC) LEDs 23

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Table 1-12 Interpretingbattery pack LEDs
(continued)
Interpretation
LED 4 State
LED 3 State
The battery pack is fully charged, and posted write data is stored in the cache.
Steady glow
--
The battery pack is fully charged, and there is no posted write data in the cache.
Off
--
An alternating green and amber flash pattern indicates that the cache
microcontroller is executing from within its boot loader and receiving new flash
code from the host controller.
One flash per
second
One flash per
second
There is a short circuit across the battery terminals or in 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.
--
Steady glow
There is an open circuit across the battery terminals or in 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 flash per
second
Flash-Backed Write Cache (FBWC) LEDs
The FBWC module has two single-color LEDs (green and amber). The LEDs are duplicated on
the reverse side of the cache module to facilitate status viewing.
Table 1-13 Flash-Backed Write Cache LEDs
Interpretation
Amber LED
Green LED
A backup is in progress.
On
Off
A restore is in progress.
On
Flashing (1 Hz)
The capacitor pack is charging.
Off
Flashing (1 Hz)
The capacitor pack has completed charging.
Off
On
One of the following conditions exists:
•
The charging process has timed out.
•
The capacitor pack is not connected.
Flashing (2 Hz)
Alternating with
green LED
Flashing (2 Hz)
Alternating with
amber LED
The flash code image failed to load.
On
On
The flash code is corrupt.
Off
Off
Fault management features
The Smart Array Controllers and the HP-UX operating system support the following fault
management and data reliability features that minimize the impact of disk drive defects on your
systems:
Auto-Reliability Monitoring (ARM)
A firmware process that operates in the background,
scanning physical disks for bad sectors in fault-tolerant
logical drives. ARM also verifies the consistency of parity
data in logical drives that use RAID 5 or RAID ADG. This
process assures that you can recover data successfully if a
disk fails. ARM operates when you select a fault-tolerant
configuration.
Dynamic sector repair
Automatically remaps any sectors that have media faults
detected during normal operation or by Auto-Reliability
Monitoring.
S.M.A.R.T.
An industry-standard diagnostic and failure prediction
feature of physical disks, developed by HP in collaboration
with the disk drive industry. S.M.A.R.T. monitors factors
Flash-Backed Write Cache (FBWC) LEDs
23