HP Insight Management Agents - Manual (Page 80)

information is distributed across all of the drives. If a failure is detected, the Drive Array
Controller rebuilds the data using the data guard information from all the drives.
◦ Advanced Data Guarding - (RAID ADG) is the fault tolerance method that provides the
highest level of data protection. It stripes data and parity across all the physical drives
in the configuration to ensure the uninterrupted availability of uncorrupted data. This
fault-tolerance method is similar to RAID 5 in that parity data is distributed across all
drives in the array, except in RAID ADG the capacity of multiple drives is used to store
parity data. Assuming the capacity of 2 drives is used for parity data, this allows continued
operation despite simultaneous failure of any 2 drives in the array, whereas RAID 4 and
RAID 5 can only sustain failure of a single drive.
◦ Unknown - You may need to upgrade your software.
•
Capacity displays the size of the logical drive.
•
Accelerator indicates whether the logical drive has an Array Accelerator board configured
and enabled. The following values are valid:
◦ Enabled - The Array Accelerator board is configured and enabled for this logical drive.
Run the System Configuration Utility to change this value.
◦ Disabled - The Array Accelerator board is configured but not enabled for this logical
drive. Run the System Configuration Utility to change this value.
◦ Unavailable - There is no Array Accelerator board configured for this logical drive.
◦ Unknown - The Storage Agents do not recognize the Array Accelerator board. You may
need to upgrade your software.
•
Stripe Size displays the size of a logical drive stripe in kilobytes.
•
OS Assigned Name displays the operating system name associated with this logical drive.
•
Preferred Path displays the preferred controller path to this logical drive in a redundant
active/active configuration. The preferred path is only relevant when the Preferred Path Mode
is configured as Manual.
•
Current Path displays the current controller path to this logical drive in a redundant active/active
configuration.
Identify Drive
Select the length of time to identify the physical drives that make up the logical drive from the
drop-down list box and then select the Start button. The page will automatically refresh and display
an image of an identified drive and a Stop button. Select the Stop button to end identification
before the time expires.
After the drive identification completes, the page will have to be manually refreshed to display the
Start button. There may be a delay, depending on the length of the HP Management Agents data
collection interval, after the drive identification completes and before the Start button can be
displayed.
Only drives in hot plug trays are supported since the LEDs are part of the tray. Spare drives that
are included in the logical drive will also be identified. Only one logical drive on a selected
controller may be identified at a time. If a different drive is selected while another drive is currently
identified then the other drive will stop identification and the selected drive will be identified.
80 Agent information