Supermicro AOC-USAS2-L8e, Руководство пользователя

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5-3
Chapter 5: Integrated Striping
Figure 5-2 shows a logical view and a physical view of Integrated Striping configuration.
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.
5-4 Integrated Striping Firmware
This section describes features of the Integrated RAID firmware.
Metadata Support
The firmware supports metadata, which describes the IS logical drive configuration
stored on each member disk. When the firmware is initialized, each member disk is
queried to read the stored metadata to verify the configuration. The usable disk space
for each IS member disk is adjusted down when the configuration is created, in order to
leave room for this data.
Figure 5-1. Integrated Striping Example
Figure 5-2. Integrated Striping – Logical and Physical Views
LSI
Fusion-MPT
Controller
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
SAS
Logical View Physical View
+
Stripe N
...
Stripe 3
Stripe 2
Stripe 1
Stripe N
...
Stripe 3
Stripe 2
Stripe 1
Stripe N
...
Stripe 3
Stripe 2
Stripe 1
Stripe N
...
Stripe 3
Stripe 2
Stripe 1
+