Data recovery speed of OceanStor 9000

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Data recovery speed of OceanStor 9000: 1 TB/h

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Data recovery speed of OceanStor 9000
Data recovery speed of OceanStor 9000: 1 TB/h

OceanStor 9000 V100R001C01 data recovery for a failed disk
OceanStor 9000 V100R001C01 recovers data for a failed disk using the following methods: 1. If the disk has been offline for at most 10 minutes and has turned offline for no more than four times within 10 minutes, OceanStor 9000 V100R001C01 updates data changes within the offline duration to a normal disk and ensures zero loss of original data on the failed disk. 2. If the disk has been offline for over 10 minutes or has returned offline for five times within 10 minutes, or the failed disk cannot be restored and cannot go online again, OceanStor 9000 V100R001C01 obtains the data on the failed disk through calculations and writes the data to other normal disks.

OceanStor 9000 V100R001C01 data recovery for a failed node
OceanStor 9000 V100R001C01 recovers data for a failed node using the following methods: 1. If the failed node turns normal, OceanStor 9000 V100R001C01 recovers data changes within the offline duration to a normal node and ensures zero loss of original data on the failed node. 2. If the offline node requires an operation by the administrator, OceanStor 9000 V100R001C01 obtains the data on the failed node through calculations and writes the data to disks of other normal nodes.

Principles of quick data recovery using OceanStor 9000 V100R001C01
Based on the load balancing policy and data protection levels, OceanStor 9000 divides storage resources into multiple logical groups, and each disk may belong to multiple logical groups. A logical group is an independent unit for data protection and recovery. A data protection level is assigned to each logical group (for example, 4+2). If a disk failure triggers data recovery, all logical groups to which the failed disk belongs will take part in data recovery concurrently. Therefore, the recovery speed is faster than that of a traditional RAID group. If a node failure triggers data recovery, logical groups to which all disks of the failed node belong will take part in data recovery concurrently. The maximum recovery speed is 1 TB/hour.

Impact of policies for automatic data recovery on OceanStor 9000 V100R001C01
The impact of policies for automatic data recovery on OceanStor 9000 V100R001C01 defines the system performance impact of data recovery tasks within an execution period specified by data recovery policies.

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