Dell 8 Посібник користувача - Сторінка 9

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Dell 8 Посібник користувача

Shared PERC 8 Card Features

Some of the features of the Shared PERC 8 card are as follows:

Physical disk power management

Consistency checks

Types of virtual disk initialization
Disk roaming
FastPath
Virtual disk migration
Virtual disk cache policies
Fault tolerance
Patrol read
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 you are using a configured disk spun up to full RPM.
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 detailed navigation of the CMC for Shared PERC 8, see the
PowerEdge VRTX User's Guide at dell.com/esmmanuals.

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.

Background Initialization Of Virtual Disks

Both Consistency Check (CC) and Background Initialization (BGI) correct parity errors. However, CC reports data
inconsistencies through an event notification, but BGI does not. You can start CC manually, but not BGI.
NOTE: BGI does not run on RAID 0 virtual disks.
Dell Chassis Management Controller for Dell
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