Dell PowerEdge Expandable RAID Controller 3 User's Manual
Download Operation & user’s manual of Dell DC, 3 Computer Hardware for Free or View it Online on All-Guides.com. This version of Dell DC, 3 Manual compatible with such list of devices, as: DC, 3, DCL and 3, PowerEdge Expandable RAID Controller 3, QC, 3, SC PERC 3
Brand: Dell
Category: Computer Hardware
Type: Operation & user’s manual
Model: Dell DC, 3 , Dell DCL and 3 , Dell PowerEdge Expandable RAID Controller 3 , Dell QC, 3 , Dell SC PERC 3
Pages: 254 (1.33 Mb)
Introduction to RAID 37
Figure 2-4. Example of Parity
Hot Spares
A hot spare is an extra, unused disk drive that is part of the disk subsystem.
It is usually in standby mode, ready for service if a drive fails. Hot spares
permit you to replace failed drives without system shutdown or user
intervention.
PERC 3 implements automatic and transparent rebuilds using hot spare
drives, providing a high degree of fault tolerance and zero downtime. The
PERC 3 RAID management software allows you to specify physical drives as
hot spares. When a hot spare is needed, PERC 3 assigns the hot spare that
has a capacity closest to and at least as great as that of the failed drive to
take the place of the failed drive.
Parity
Generator