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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 10

RAID 10

RAID 10 is a combination of RAID 0 and RAID 1. It allows drives to be mirrored (RAID 1) and then striped (RAID 0). RAID 10 is a solution that provides good storage performance (similar to RAID 0) and data security (same as RAID 1).

Troubleshooting Process

In Figure A-28, drives 0 and 1 form subgroup 0, drives 2 and 3 form subgroup 1, and drives in the same subgroup are mirrors of each other.

If I/O requests are sent to drives in RAID 10, the sequential data requests are distributed to the two subgroups for processing (RAID 0 mode). At the same time, in RAID 1 mode, when data is written to drive 0, a copy is created on drive 1; when data is written to drive 2, a copy is created on drive 3.

Figure A-28 RAID 10 data processing
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Updated: 2019-11-01

Document ID: EDOC1000004186

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