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Huawei V2 and V3 Server RAID Controller Card User Guide 36

This document describes the appearances and features of the redundant array of independent disks (RAID) controller cards, how to configure properties for the RAID controller cards, and how to install drivers. The RAID controller cards include the LSI SAS2208, LSI SAS2308, LSI SAS3008, LSI SAS3108, LSI SoftRAID, PM8060, and PM8068.
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RAID 0, also referred to as drive striping, provides the highest storage performance in all RAID levels. In RAID 0 array, data is stored on multiple hard drives, which allows data requests to be concurrently processed on the hard drives. Each hard drive processes data requests that involve data stored on itself. The concurrent data processing can make the best use of the bus bandwidth, improving the overall hard drive read/write performance. However, RAID 0 provides no redundancy or fault tolerance. The failure of one drive will cause the entire array to fail. RAID 0 applies only to scenarios that require high I/O but low data security.

Troubleshooting Process

Figure A-24 shows how data is distributed into three drives in a RAID 0 array for concurrent processing.

RAID 0 allows the original sequential data to be processed on three physical hard drives at the same time.

Theoretically, the concurrent execution of these operations increases the drive read/write speed threefold. Although the actual read/write speed may be affected by various factors, such as the bus bandwidth, and is lower than the theoretical value, the concurrent transmission speed is definitely higher than the serial transmission speed for large-volume data.

Figure A-24 RAID 0 data processing

Updated: 2019-11-01

Document ID: EDOC1000004186

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