NEC IS007-10E (5) RAID10

Appendix C RAID

(5) RAID10

This method slices data (sent from the host) and distributes (RAID0) the data to pairs of mirrored

disks (RAID1).

Since RAID10 distributes data to multiple disks, it enables concurrent processing and makes

quick access. In addition, it has the same data in dual configuration. Even if one of the disks

fails, the other disk enables access to the data.

Reliability is about 1/n (n: number of paired sets of RAID1 disks) of RAID1 consisting of two

disks. Reliability is lower than that of a single RAID1, but it is still high enough.

y High reliability

y Quick access

y No performance deterioration when a single disk fails

y Redundant data takes up a half of the disk capacity.

Data Sent from Host

Block2 Block3Block1 Block4 Block5

Block1

Block3

Block5

Block2

Block4

Physical Disk 1

Block1

Block3

Block5

Block2

Block4

2 3 4

Contents

Main Configuration Setting Tool Users Manual (GUI) Page Preface Page Contents Page Page Page Page Page I-3 (4) 2000 series (5) 1000 series (6) 100 series Page I-5 I-6 I-7 I-8 <2800 series> PDPD PD PD PD PD I-9 PD PDPD PD PD PD PD I-10 I-11 I-12 I-13 I-14 I-15 I-16 I-17 I-18 (2) Logical configuration of a disk array Chapter 1 Storage Overview ... I-19 ... I-20 ... I-21 Chapter 2 Overview of Disk Array Configuration Setting Page Page Page Chapter 2 Overview of Disk Array Configuration Setting I-25 y Pool Disk Arra I-26 (1) You can bind a dynamic pool: (2) You can expand the dynamic pool capacity: I-27 (3) You can bind the logical disks: (4) You can expand the logical disk capacity: Page Page Page Page I-32 Chapter 3 Overview of AccessControl Inaccessible Area A ccessible rea Page Chapter 3 Overview of AccessControl WWN (WWPN) LD Set LD Set LD Set WWN Mode Port Mode WWN (WWPN) Port Number Page Chapter 3 Overview of AccessControl I-36 Switch Switch Page I-38 I-39 (2) Setting I-40 Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page IV-3 IV-4 IV-5 Page Page Page IV-9 (2) Setting about the pool binding wizard IV-10 (3) Selecting the pool type Page IV-12 IV-13 (5) Selecting physical disks Page IV-15 (6) Setting detailed parameters IV-16 IV-17 (7) Checking for the parameters specified for the pool IV-18 IV-19 IV-20 (8) Finishing binding the pool Page IV-22 IV-23 IV-24 IV-25 Page IV-27 IV-28 Page IV-30 Page IV-32 IV-33 Page Page IV-36 (2) Setting about the LD binding wizard IV-37 (3) Selecting a pool IV-38 (4) Selecting unused areas IV-39 (5) Specifying the way of binding the logical disks IV-40 IV-41 (6)-1 Specifying the number of logical disks IV-42 (6)-2 Specifying the logical disk capacity IV-43 IV-44 (6)-3 Specifying the number of logical disks and the logical disk capacity IV-45 IV-46 IV-47 (7) Setting the detailed parameters for binding the logical disks IV-48 IV-49 IV-50 IV-51 (8) Checking for the parameters specified for the logical disks to bind IV-52 (9) Finishing binding the logical disks Page IV-54 IV-55 Page IV-57 Page IV-59 Page IV-61 Page IV-63 (1) Starting up the LD Batch Binding Wizard IV-64 (2) Specifying the number of pools and the number of spares IV-65 (3) Checking for the parameters specified for the pool(s) IV-66 IV-67 (4) Specifying the way of binding the logical disks IV-68 IV-69 (5)-1 Specifying the number of logical disks IV-70 (5)-2 Specifying the logical disk capacity IV-71 IV-72 (5)-3 Specifying the number of logical disks and the logical disk capacity IV-73 Page IV-75 (6) Specifying the detailed settings of the logical disks IV-76 IV-77 IV-78 IV-79 (7) Checking for the parameters for batch binding the logical disks IV-80 Page IV-82 (8) Finishing batch binding the logical disks IV-83 Page IV-85 (2) Setting about the spare binding wizard IV-86 (3) Selecting physical disks IV-87 (4) Checking for the parameters specified for the spare IV-88 (5) Finishing binding the spare Page IV-90 Page IV-92 IV-93 Page Page IV-96 Page IV-98 IV-99 (2) [Physical Disk] tab Page Page Page IV-103 Page IV-105 Page IV-107 Page IV-109 Page IV-111 (2) Rebuild Start Instruction IV-112 IV-113 Page Page IV-116 IV-117 IV-118 Page Page Page IV-122 IV-123 (2) Execution conditions (3) Disk relationship (4) Complement IV-124 (5) LD Batch Binding screen IV-125 IV-126 IV-127 IV-128 (6) Confirm LD Batch Binding screen IV-129 IV-130 (7) Result screen IV-131 Page Page Page Page IV-136 IV-137 Page Page Page Page Page Page Page IV-145 IV-146 IV-147 (2) Operation IV-148 Page IV-150 IV-151 (2) Operation IV-152 Page Page IV-155 Page Page Page IV-159 Page Page IV-162 (1) Platform screen Page IV-164 IV-165 IV-166 IV-167 IV-168 Page IV-170 Page IV-172 IV-173 Page Page IV-176 Page IV-178 Page IV-180 IV-181 Page IV-183 (1) [Change Port Mode] button IV-184 Page Page IV-187 Page IV-189 IV-190 IV-191 Page Page IV-194 Page Page Page IV-198 IV-199 IV-200 Page IV-202 IV-203 IV-204 Page IV-206 Page IV-208 (1) [Start Access Control] button Page IV-210 IV-211 IV-212 IV-213 IV-214 IV-215 IV-216 (2) Candidate LD List IV-217 IV-218 (3) [Get Disk Array Info.] button IV-219 (4) [All Selection] check box Page IV-221 (2) Product Information field Page IV-223 IV-224 Page Page Page Page Page (3) Termination of the iSMnetconf command Page Page Page Page (3) Example of the setting file (4) Notes Page Page (1) RAID0 (2) RAID1 (3) RAID5 (4) RAID6 Data Sent from Host (5) RAID10 (6) RAID50 Data Sent from Host Page Page (2) S series (not including S400/S1400/S2400/S2800 and 3000/4000 series) Page Page Page Page Page Page Page Page Page Appendix E Logical Disk Used Capacity Page Page Page Page Page Page Page Page (2) Pair setting sample Page Appendix G ACOS-4 Resource Operation Guard (1) ACOS-4 resources (2) Operations related to the ACOS-4 resources (3) Functions and operations subject to the ACOS-4 resource operation guard Page Index