EMC CX500I Configuration Guide - Page 39

A RAID 1/0 Group can survive the failure of multiple disks

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RAID Types and Trade-offs Stripe Element Size Stripe Size Stripe Blocks 0-127 First Disk of Primary Image 384-511 768-895 1152-1279 1536-1663 ... Second Disk of Primary Image 128-255 512-639 896-1023 1280-1407 1664-1791 ... Third Disk of Primary Image 256-383 640-767 1024-1151 1408-1535 1792-1919 ... 0-127 First Disk of Secondary Image 384-511 768-895 1152-1279 1536-1663 ... Second Disk of Secondary Image 128-255 512-639 896-1023 1280-1407 1664-1791 ... Third Disk of Secondary Image 256-383 640-767 1024-11511408-1535 1792-1919 ... User Data EMC1818 Figure 2-5 RAID 1/0 Group A RAID 1/0 Group can survive the failure of multiple disks, providing that one disk in each image pair survives. RAID Types 2-9

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RAID Types
2-9
RAID Types and Trade-offs
Figure 2-5
RAID 1/0 Group
A RAID 1/0 Group can survive the failure of multiple disks,
providing that one disk in each image pair survives.
EMC1818
Stripe
Element
Size
Stripe
Size
…
…
…
…
…
User Data
First Disk of Primary Image
Second Disk of Primary Image
Third Disk of Primary Image
Third Disk of Secondary Image
First Disk of Secondary Image
Second Disk of Secondary Image
512-639
128-255
1664-1791
1280-1407
896-1023
1536-1663
1152-1279
768-895
…
512-639
1024-1151
1024-1151
1536-1663
0-127
128-255
640-767
640-767
1152-1279
256-383
256-383
768-895
1664-1791
384-511
1280-1407
1792-1919
1792-1919
896-1023
1408-1535
1408-1535
Stripe
Blocks
0-127
384-511