Users guide

27 Intel® RAID Software User Guide
products, beginning with those designed to utilize the LSI 2208 and LSI2308 SAS
products. Currently shipping Intel
®
RAID and SAS products will support 4K sector drives
running in legacy 512b sector mode.
2.4.13 Larger than 2TB Drive Support
The disk drive industry is in transition to support disk drives with volume size larger than
2 Terabytes. The Intel
®
6G SAS PCIe Gen2 RAID Controllers can fully recognize and
configure the volume of these disk drives. For the other RAID types listed in “Supported
Hardware” section, there is no problem for the first 2TB space of the disk drive to be
recognized and configured.
2.4.14 Power Save settings
The controller conserves energy by placing certain unused drives into powersave mode.
The controller will automatically spin up drives from powersave mode whenever
necessary. Drives that can be set to power save mode are: Unconfigured Drives, Hot Spare
Drives, Configured Drives. The setting can be made in either RAID BIOS Console 2, or
RAID Web Console 2. There is also a way to disable this setting from CmdTool2, by
typing:
CmdTool2 -LDSetPowerPolicy -None -Lall -a0
This command only has effect when one or more logical drives are created. The Power
Save mode currently is only supported by Intel
®
Intelligent RAID products.
2.4.15 Shield State
Physical devices in RAID firmware transit between different states. If the firmware
detects a problem or a communication loss for a physical drive, the firmware transitions
the drive to a bad (FAILED or UNCONF BAD) state. To avoid transient failures, an
interim state called the Shield State is introduced before marking the drive as being in a
bad state.
The Shield State is an interim state of a physical drive for diagnostic operations. The
results of the diagnostic tests determine if the physical drive is good or bad. If any of the
diagnostic tests fail, the physical drive transitions to a bad state (FAILED or UNCONF
BAD).
The three possible Shield States are:
• Unconfigured - Shielded
• Configured - Shielded
• Hotspare - Shielded
Physical View and Logical View in either RAID BIOS Console 2 or RAID Web Console 2
can reflect drive S
hield State. Other drive states include:
• Unconfigured Good