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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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Data Rebuild

Data Rebuild

If a faulty drive occurs on a RAID array, you can use the data rebuild function of the RAID controller card to rebuild data on a new drive for the faulty drive. The data rebuild function applies only to RAID 1, 5, 6, 10, 50, and 60 with redundancy.

The RAID controller card provides the function of automatically rebuilding data on a hot spare drive for a faulty member drive. If the RAID array is configured with an available hot spare drive, and one of its member drives becomes faulty, the hot spare drive automatically replaces the faulty drive and rebuilds data. If the RAID array has no available hot spare drive, data can be rebuilt only after the faulty drive is replaced with a new drive. When the hot spare drive starts rebuilding data, the faulty member drive enters the removable state. If the system is powered off during the data rebuild, the RAID controller card continues the data rebuild task after the system restart.

The data rebuild rate indicates the proportion of CPU resources occupied by a data rebuild task to the overall CPU resources. The data rebuild rate can be set to 0%–100%. The value 0% indicates that the RAID controller card starts the data rebuild task only when no other task is running in the system. The value 100% indicates that the data rebuild task occupies all CPU resources. You can customize the data rebuild rate. It is recommended that you set it to an appropriate value based on the site requirements.

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Updated: 2019-11-01

Document ID: EDOC1000004186

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