319
Chapter 9: Technology Background
This chapter covers the following topics:
•
Introduction to RAID (below)
•
Choosing a RAID Level (page 332)
•
Choosing Stripe Size (page 336)
•
Choosing Sector Size (page 336)
•
Cache Policy (page 337)
•
Capacity Coercion (page 339)
•
Initialization (page 340)
•
Hot Spare Drive(s) (page 340)
•
Partition and Format the Logical Drive (page 341)
•
RAID Level Migration (page 341)
•
Media Patrol (page 350)
•
Predictive Data Migration (PDM) (page 351)
•
Transition (page 352)
Introduction to RAID
RAID (Redundant Array of Independent Disks) allows multiple physical drives to
be combined together in a disk array. Then all or a portion of the disk array is
formed into a logical drive. The operating system sees the logical drive as a
single storage device, and treats it as such.
The RAID software and controller manage all of the individual drives. The
benefits of a RAID can include:
•
Higher data transfer rates for increased server performance
•
Increased overall storage capacity for a single drive designation (such as, C,
D, E, etc.)
•
Data redundancy/fault tolerance for ensuring continuous system operation in
the event of a hard drive failure
Different types of logical drives use different organizational models and have
varying benefit
s. Also see ―Choosing a RAID Level‖ on page 332. The following
outline breaks down the properties for each type of RAID logical drive:
Summary of Contents for DS300f
Page 1: ...ASUS Storage DS300f DS300i User Manual Version 1 0 ...
Page 10: ...x Language 178 Closing Smart NAS Console 178 ...
Page 27: ...8 Chapter 1 Introduction to ASUS Storage ...
Page 57: ...3 8 Chapter 2 ASUS Storage Installation ...
Page 73: ...54 Chapter 3 ASUS Storage Setup ...
Page 164: ...14 5 Chapter 4 Management with ASUS Storage Management ...
Page 221: ...202 Chapter 5 SmartNAVI ...
Page 235: ...216 Chapter 6 Management with the CLU Figure 4 Controller Status LED Controller Status ...
Page 337: ...318 Chapter 8 Maintenance ...
Page 425: ...406 Chapter 11 Support ...
Page 433: ...414 Appendix A Setting up NAS Network Drives ...
Page 449: ...430 Index ...