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Shared PERC 8 Card Features
Some of the features of the Shared PERC 8 card are as follows:
• Physical disk power management
• Consistency checks
• Virtual disk initialization
• Disk roaming
• FastPath
• Virtual disk migration
• Virtual disk cache policies
• Fault tolerance
• Patrol read
• Multipath support

Physical Disk Power Management

Physical disk power management is a power saving feature of the Shared PERC 8 card. Idle-C feature, as
defined by the T10 organization, is auto-enabled for physical disk power management. Physical disks that
support Idle-C feature, spin at lower RPMs upon timer expiration when there is no I/O activity.
NOTE: There is a delay to I/O operations when a configured disk is being spun up.
NOTE: For detailed information about power management, see the Dell Chassis Management
Controller for Dell PowerEdge VRTX User’s Guide at dell.com/poweredgemanuals.

Consistency Checks

Consistency Check (CC) is a background operation that verifies and corrects the mirror or parity data for
fault tolerant virtual disks. It is recommended that you periodically run a consistency check on virtual
disks. You can manually start a CC in the Dell Chassis Management Controller (CMC).
NOTE: For more information about consistency checks, see the Dell Chassis Management
Controller for Dell PowerEdge VRTX Online Help.

Virtual Disk Initialization

CAUTION: Initializing virtual disks erases the files and file systems but keeps the virtual disk
configuration intact. Initializing a virtual disk destroys all data on the virtual disk.
You can initialize virtual disks as described in the following sections.
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