Specifications

176 en | S.M.A.R.T. Configuration SCSI to SATA RAID Subsystem | Administrator’s Manual
F.01U.027.802 | V1 | 2006.11 Bosch Security Systems
12 S.M.A.R.T. Configuration
12.1 Overview
S.M.A.R.T.
With the maturity of technologies like S.M.A.R.T., drive failures can be predicted to certain
degree. Before S.M.A.R.T., receiving notifications of drive bad block reassignments may be the
most common omen that a drive is about to fail. In addition to the S.M.A.R.T.-related functions
as will be discussed later, a system administrator can also choose to manually perform “Clone
Failing Drive” on a drive which is about to fail.
This function provides system administrators a choice on when and how to preserve data from
a failing drive. Although not necessary under normal conditions, you may also replace any
drive at-will even when the source drive is healthy.
The “Clone Failing Drive” can be performed under the following conditions:
1. Replacing a failing drive either detected by S.M.A.R.T. or notified by the controller.
2. Manually replacing and cloning any drive with a new drive.
12.2 Clone Failing Drive
Unlike the similar functions combined with S.M.A.R.T., the “Clone Failing Drive” is a manual
function. There are two options for cloning a failing drive: “Replace after Clone” and “Perpet-
ual Clone.”
Replace after Clone
Data on the source drive, the drive with predicted errors (or any selected member drive), will
be cloned to a standby spare and replaced later by the spare. The status of the replaced drive,
the original member drive with predicted errors, will be redefined as a “used drive.” System
administrators may replace the “used drive” with a new one, and then configure the new drive
as a spare drive.
Locate the logical drive to which the drive with predictable errors belongs. Select the “Clone
Failing Drive” function.
Select “Replace After Clone.” The controller will automatically start the cloning process using
the existing “stand-by” (dedicated/global spare drive) to clone the source drive (the target
member drive with predicted errors). If there is no standby drive (local/global spare drive),
you need to add a new drive and configure it as a standby drive.
Fig. 12.1 Select Clone and Replace Drive
Fig. 12.2 Starting Clone and Replace Drive