概览:
生成空镜像
注意:count=200,即镜像大小为200M(太小的话,在f2fs文件系统下储存不下内核。),如若需要可以弄大一点儿(2048,4096等)。
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| mkdir image cd image dd bs=1M count=200 if=/dev/zero of=rpi64.img
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镜像分区
(1).选择分区格式:dos
(2).新建分区30M,primary(主分区),选择Bootable(可启动),再选则Type为(b W95 FAT32),
(3).选择剩余分区(Free space)
(4).选择新建分区(默认剩余全部),primary(主分区)
(5).选择Write写入分区信息
(6).选择Quit,完成写入
格式化
挂载虚拟文件系统
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| sudo kpartx -av rpi64-v0.1.img
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标准输出:
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| add map loop0p1 (253:0): 0 61440 linear 7:0 2048 add map loop0p2 (253:1): 0 346112 linear 7:0 63488
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** 然后格式化**
格式化第一个分区为FAT32,格式化第二个分区为f2fs
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| sudo mkfs.vfat /dev/mapper/loop0p1 sudo mkfs.f2fs /dev/mapper/loop0p2
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标准输出:
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| mkfs.fat 4.1 (2017-01-24)
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| F2FS-tools: mkfs.f2fs Ver: 1.11.0 (2018-07-10)
Info: Disable heap-based policy Info: Debug level = 0 Info: Label = Info: Trim is enabled Info: Segments per section = 1 Info: Sections per zone = 1 Info: sector size = 512 Info: total sectors = 346112 (169 MB) Info: zone aligned segment0 blkaddr: 512 Info: format version with "Linux version 4.15.0-54-generic (buildd@lgw01-amd64-014) (gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #58-Ubuntu SMP Mon Jun 24 10:55:24 UTC 2019" Info: [/dev/mapper/loop0p2] Discarding device Info: This device doesn't support BLKSECDISCARD Info: Discarded 169 MB Info: Overprovision ratio = 15.000% Info: Overprovision segments = 29 (GC reserved = 21) Info: format successful
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卸载虚拟文件系统
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| sync sudo kpartx -dv /dev/loop0 sudo losetup -d /dev/loop0
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检验