PPT：《qcow2镜像检测及修复》
https://github.com/zhangyoujia/qcow2-dump/qcow2镜像检测与修复.pptx
Copyright (c) 2016-2023 YOUPLUS
Author: YOUPLUS
qcow2-dump is a useful tool for checking and repairing damaged qcow2 image, it has some improvements compare with qemu-img check command (qcow2-dump has all functions which qemu-img check command has).
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基础：qcow2镜像格式及分配模式
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qcow2-dump -h/--help (工具的参数说明、功能介绍及现场演示)
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qcow2-dump工具的设计实现：
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检测性能：
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