Users Guide

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
• Supports controller level encryption
Topics:
• Physical disk power management
• Consistency Checks
• Virtual disk initialization
• Physical disk roaming
• FastPath
• Virtual disk migration
• Virtual disk cache policies
• Physical disk write cache policy
• Fault tolerance
• 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 dened by the T10 organization,
is autoenabled 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 congured 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 veries and corrects the mirror or parity data for fault tolerant virtual disks. Dell
recommends that you periodically run a CC 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 .
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12 Shared PERC 8 card features