Dell UCPM-800 Shared Perc 8 Card Features, Physical Disk Power Management, Consistency Checks

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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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