Owner manual

Agent information 56
• Serial Number—Displays the serial number of the disk drive.
• Firmware Revision—Displays the firmware version of the disk drive.
• Capacity—Displays the size of the drive.
• Transfer Mode—Displays the data transfer mode of the disk drive. The following values are valid:
• PIO Mode 0—The data transfer mode is programmed input/output mode 0.
• PIO Mode 1—The data transfer mode is programmed input/output mode 1.
• PIO Mode 2—The data transfer mode is programmed input/output mode 2.
• PIO Mode 3—The data transfer mode is programmed input/output mode 3.
• PIO Mode 4—The data transfer mode is programmed input/output mode 4.
• DMA Mode 0—The data transfer mode is direct memory access mode 0.
• DMA Mode 1—The data transfer mode is direct memory access mode 1.
• DMA Mode 2—The data transfer mode is direct memory access mode 2.
• Ultra DMA Mode 0—The data transfer mode is ultra direct memory access mode 0.
• Ultra DMA Mode 1—The data transfer mode is ultra direct memory access mode 1.
• Ultra DMA Mode 2—The data transfer mode is ultra direct memory access mode 2.
• Ultra DMA Mode 3—The data transfer mode is ultra direct memory access mode 3.
• Ultra DMA Mode 4—The data transfer mode is ultra direct memory access mode 4.
• Ultra DMA Mode 5—The data transfer mode is ultra direct memory access mode 5.
• Unknown—The Storage Agents cannot determine the disk drive data transfer mode.
• OS Assigned Name—Displays the operating system name associated with this disk drive.
• Disk Type—Indicates the type of disk drive. The following values are valid:
• ATA—The disk is a parallel ATA disk drive.
• SATA—The disk is a Serial ATA disk drive.
• Unknown—The Storage Agents cannot determine the disk type.
Logical drives
This is a list of logical drives that includes this physical drive as a member. Select one of the listed logical drives to
see more information about the drive.
IDE ATA logical drives
A list of logical drives associated with the controller displays in the Mass Storage submenu. Each logical drive in the
list displays the condition, logical drive number and the fault tolerance of that logical drive. Select one of the logical
drive entries to display the following information.
• Status—Displays the status of the logical drive. The logical drive can be in one of the following states:
• OK—Indicates that the logical drive is in normal operation mode.
• Degraded—Indicates that at least one physical drive has failed, but the logical drive’s RAID level lets the
drive continue to operate with no data loss.
• 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.