HP ProLiant DL380 G5 Server - Manual (Page 56)

• Rebuilding—Indicates that the logical drive is rebuilding a physical drive. When complete, the logical drive
returns to normal operation.
• Failed—Indicates that more physical drives have failed than the RAID level of the logical drive can handle
without data loss.
• Unknown—The agent cannot determine the logical drive status. You might need to upgrade your software.
• Fault Tolerance—Displays the fault tolerance mode of the logical drive. The following values are valid:
• RAID 0—Fault tolerance is not enabled. Data loss occurs for that logical drive if one physical drive fails.
• RAID 1—Drive mirroring is the highest level of fault tolerance. It is the only method offering fault tolerance
protection if no more than two physical drives are selected. Drive mirroring creates fault tolerance by storing
duplicate data on two drives. This is the most costly fault tolerance method because it requires 50 percent of
the drive capacity to store the redundant data. If a physical drive fails, the mirror drive provides a backup
copy of the files and normal system operations are not interrupted.
• RAID 0+1—Drive mirroring is the highest level of fault tolerance. There must be four drives for RAID 0+1.
This is the most costly fault tolerance method because it requires 50 percent of the drive capacity to store
the redundant data. If a physical drive fails, the mirror drive provides a backup copy of the files and normal
system operations are not interrupted. This mirroring feature can withstand multiple simultaneous drive
failures as long as the failed drives are not mirrored to each other.
• Unknown—The agent cannot determine the RAID level of this logical drive. You might need to upgrade your
software.
• Capacity—Displays the size of the logical drive in megabytes. For example, 120 indicates that the logical drive
is 120 megabytes. Use this data to determine whether the drive is large enough to accommodate your needs.
The capacity utility defines a megabyte as 1,048,576 bytes. The capacity value shown might differ from the
stated size of the drive due to different definitions of a megabyte. Many hardware manufacturers use the value
of 1,000,000 for megabyte instead of 1,048,576.
• Stripe Size—Displays the size of a logical drive stripe in kilobytes.
• Disk Rebuilding—Identifies the physical drive that is being rebuilt. The identity of the physical drive only displays
when the status of the logical drive is Rebuilding, otherwise, N/A displays.
Physical drives
This is a list of physical drives that make up the logical drive. Select one of the listed physical drives to see more
information about the drive.
Spare drives
This is a list of physical drives that can be used to replace a failed physical drive if the fault tolerance mode is RAID 1
or RAID 0+1. Select one of the listed spare drives to see more information about the drive.
SCSI controllers
Select a SCSI controller entry from the Mass Storage list to display a submenu containing separate entries for
Controller Information, SCSI devices connected to the controller, and Storage System information. Device types
include disks, DVD/CD-ROM drives, tape drives, processors, tape libraries, CD libraries, scanners, optical drives,
WORM drives, and so on. The following items might be displayed depending on the type of controller:
• Controller information
• SCSI device information
• Tape library
• Tape devices
• CD storage system
• Storage Systems
• SCSI physical drives
• SCSI logical drives
• SCSI bus information
Controller information
Select a controller entry from the Mass Storage list to display the following information:
• Model—Displays the controller’s model ID, used for identification purposes. The following values are valid:
• Compaq 32-Bit Fast-SCSI-2 Controller
• Compaq Systempro/XL Integrated SCSI-2 Port
• Compaq Integrated Fast SCSI-2/P Controller
Agent information 56