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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 1E is an enhanced version of RAID 1 and uses a similar working principle. Data strips and backups of a RAID 1E array spread across all of its member drives. Like RAID 1, RAID 1E data is mirrored, so the logical drive capacity is half the total capacity of all member drives, but data is redundant and the performance is high. However, RAID 1E allows more physical drives and consists of at least three drives.

Troubleshooting Process

Figure A-29 shows how data is processed on a RAID 1E array consisting of three physical hard drives. Strip data is distributed evenly to the three drives and all data has backup data in another drive. If a single drive fails, data is not lost.

Figure A-29 RAID 1E data processing
Updated: 2019-11-01

Document ID: EDOC1000004186

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