Proware DP-503-F4A3, Installation And User Manual

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DP-503-F4A3 RAID SUBSYSTEM
Installation and User Manual 23
a Raid Set can be defined as a hot spare drive. Hot spares permit you to replace failed drives without
powering down the system. When the RAID subsystem detects a drive failure, the system will do
automatic and transparent rebuild using the hot spare drives. The Raid Set will be reconfigured and
rebuilt in the background while the RAID subsystem continues to handle system request. During the
automatic rebuild process, system activity will continue as normal, however, the system performance
and fault tolerance will be affected.
IMPORTANT: The hot spare must have at least the same or more capacity
as the drive it replaces.
1.5.4.2 Hot-Swap Disk Drive Support
The RAID subsystem has built-in protection circuit to support the replacement of SATA II hard
disk drives without having to shut down or reboot the system. The removable hard drive tray can
deliver “hot swappable” fault-tolerant RAID solution at a price much less than the cost of
conventional SCSI hard disk RAID subsystems. This feature is provided in the RAID subsystem for
advance fault tolerant RAID protection and “online” drive replacement.
1.5.4.3 Hot-Swap Disk Rebuild
The Hot-Swap feature can be used to rebuild Raid Sets with data redundancy such as RAID level 1,
0+1, 3, 5 and 6. If a hot spare is not available, the failed disk drive must be replaced with a new
disk drive so that the data on the failed drive can be rebuilt. If a hot spare is available, the rebuild
starts automatically when a drive fails. The RAID subsystem automatically and transparently
rebuilds failed drives in the background with user-definable rebuild rates. The RAID subsystem will
automatically continue the rebuild process if the subsystem is shut down or powered off abnormally
during a reconstruction process.
Chapter 2 Getting Started
2.1 Preparing the Subsystem and Powering On
Here are the basic steps to prepare the RAID subsystem for use.