Chapter 10 Software Raid1; Overview Of Software Raid1; What Is Software Raid1 - Hitachi HF-W2000 Instruction Manual

CHAPTER 10 SOFTWARE RAID1

10.1 Overview of Software RAID1

10.1.1 What is Software RAID1?

This chapter describes how to manage the Software RAID1 feature of the B model.
In this chapter, "this equipment" denotes the B model. Note that only HDDs (hard disk drives)
are used as a drive for this equipment. A drive is denoted simply as "HDD" in the following
explanation. In addition, the Software RAID1 is denoted simply as "RAID1" in the following
explanation.
The screen images shown in this chapter are the ones for Windows® 7, but the displayed
contents are basically the same for other OS. In addition, the model and the capacity of the
HDD may be different from real indication.
Although this Equipment featuring RAID1 is more reliable than general
systems, it is still prone to the loss of data in the HDDs. Not only a machine
failure but also an unexpected power failure or an operation error may cause
data to be lost for good. To prevent such loss of data, implement scheduled
data backup in daily operation. Also, protect the power source from
undesirable interruptions by such means as UPS.
 This Equipment is evaluated based on the specific HDD models authorized by
the Manufacturer. Replace only with specific HDD models authorized by the
Manufacturer. Otherwise, the existing data in the HDD may be lost. Also,
always observe the recommended replacement interval for HDDs (Refer to
"APPENDIX HANDLING REPLACEABLE COMPONENTS").
 Since each Equipment has its own RAID1 configuration information (e.g., serial
number), you cannot swap HDDs even between two units of this Equipment. If
you dare, the stored data in the newly installed HDD will be erased with
automatic RAID1 rebuilding process due to inconsistency of the RAID1
configuration information. If you own multiple units of this Equipment, manage
use and inventory of HDDs so that they are not inadvertently mixed.
● As a replacement HDD, do not use an HDD previously used in the A model or
the B model. If you do, this equipment may not operate properly or the data on
the HDDs may be lost because of configuration information mismatches or
other reasons.
● Use a brand-new HDD (an unused HDD) or an HDD to which "Initialize Drives"
has been applied (see "10.6.7 Initialize Drives function") as a replacement
HDD.
NOTICE
10-1
10. SOFTWARE RAID1