HP Xw8200 LSI SCSI: Integrated RAID User's Guide (PCI plug-in and system board - Page 41

Integrated Striping Example, Integrated Striping - Logical and Physical

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Figure 4.1 Integrated Striping Example LSI Logic Fusion-MPT Controller SCSI Bus Disk 1 Disk 2 Disk 3 Disk 4 Segment 1 Segment 5 Segment 9 Segment 2 Segment 6 Segment 10 Segment 3 Segment 7 Segment 11 Segment 4 Segment 8 Segment 12 Figure 4.2 shows a logical view and a physical view of integrated striping configuration. Figure 4.2 Integrated Striping - Logical and Physical Views Logical View Physical View Stripe 1 Stripe 2 Stripe 3 Stripe 1 Stripe 2 Stripe 3 Stripe 4 Stripe 5 Stripe 6 + + Stripe 7 Stripe 8 Stripe 9 Stripe N Stripe N-2 Stripe N-1 Stripe N The primary advantage of IS is speed, because it transfers data to or from multiple disks at once. However, there is no data redundancy; therefore, if one disk fails, that data is lost. IS Description 4-3 Version 1.0 Copyright © 2003 by LSI Logic Corporation. All rights reserved.

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IS Description
4-3
Version 1.0
Copyright © 2003 by LSI Logic Corporation. All rights reserved.
Figure 4.1
Integrated Striping Example
Figure 4.2
shows a logical view and a physical view of integrated striping
configuration.
Figure 4.2
Integrated Striping - Logical and Physical Views
The primary advantage of IS is speed, because it transfers data to or
from multiple disks at once. However, there is no data redundancy;
therefore, if one disk fails, that data is lost.
LSI Logic
Disk 1
Disk 3
Disk 4
Disk 2
Segment 1
Segment 5
Segment 9
Segment 2
Segment 6
Segment 10
Segment 3
Segment 7
Segment 11
Segment 4
Segment 8
Segment 12
SCSI Bus
Fusion-MPT
Controller
Stripe 1
Stripe 2
Stripe 3
Stripe N
Stripe 1
Stripe 4
Stripe 7
Stripe N-2
+
Stripe 2
Stripe 5
Stripe 8
Stripe N-1
+
Stripe 3
Stripe 6
Stripe 9
Stripe N
Logical View
Physical View