4-28 Configuring Your Server
RAID Controller
HDD 1
HDD 2
HDD 3
Stripe 2
Parity (3, 4)
Stripe 5
Parity (1, 2)
Stripe 3
Stripe 6
Stripe 1
Stripe 4
Parity (5, 6)
RAID6
A RAID 6 extends RAID 5 by adding an additional parity block (Q) created by different calculation method such as weighting
by some factor, thus it uses block-level striping with two parity blocks distributed across all member disks. This mode is called
"striping with duplex and distributed parity". Accordingly, the total capacity assigned to the parity is just the same as the
capacity of two HDDs. If two of the HDDs configuring a logical drive are defective, data is still available without problems.
RAID Controller
HDD 1
HDD 2
Stripe 1
HDD 3
Stripe 4
Stripe 2
Parity P (3,4)
Parity P (1,2)
Parity Q (3,4)
Parity P (5,6)
Parity Q (5,6)
Stripe 5
HDD 4
Parity Q (1,2)
Stripe 3
Stripe 6
Parity Q (7,8)
Stripe 7
Stripe 8
Parity P (7,8)
Summary of Contents for NovaScale R440 E2
Page 1: ...NovaScale R440 E2 User s Guide NOVASCALE REFERENCE 86 A1 46FB 00...
Page 2: ......
Page 32: ...1 16 Notes on Using Your Server...
Page 70: ...2 38 General Description...
Page 94: ...3 24 Setting Up Your Server This page is intentionally left blank...
Page 147: ...Configuring Your Server 4 53 Property of Physical Device in the Universal RAID Utility...
Page 272: ...5 74 Installing the Operating System with Express Setup This page is intentionally left blank...
Page 308: ...7 12 Maintenance This page is intentionally left blank...
Page 408: ...9 54 Upgrading Your Server Screws...
Page 446: ...9 92 Upgrading Your Server This page is intentionally left blank...
Page 456: ......
Page 458: ...C 2 IRQ This page is intentionally left blank...
Page 490: ...D 32 Installing Windows Server 2008 4 Activate Windows The Windows activation is complete...
Page 494: ......
Page 544: ...G 2 Using a Client Computer with a CD Drive This page is intentionally left blank...
Page 548: ...H 4 Product Configuration Record Table This page is intentionally left blank...
Page 551: ......
Page 552: ...BULL CEDOC 357 AVENUE PATTON B P 20845 49008 ANGERS CEDEX 01 FRANCE REFERENCE 86 A1 46FB 00...