ext image/manually create in Linux

最新推荐文章于 2024-12-29 16:55:56 发布

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最新推荐文章于 2024-12-29 16:55:56 发布

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分类专栏： RHEL CrossPlatform Linux

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本文详细记录了使用dd命令创建不同大小的磁盘镜像文件的过程，以及如何利用mkfs.ext4对镜像进行格式化，并将文件系统复制到新创建的镜像中。

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lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$ du -hs rootfs-friendlycore-arm64-20190718
3.9G rootfs-friendlycore-arm64-20190718

lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$ dd if=/dev/zero of=new_img.img bs=1M count=4096
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB, 4.0 GiB) copied, 5.57681 s, 770 MB/s

lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$ dd if=/dev/zero of=new_img.img bs=1M count=8192

lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$
lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$ 8192+0 records in
8192+0 records out
8589934592 bytes (8.6 GB, 8.0 GiB) copied, 24.1704 s, 355 MB/s

[3]- Done dd if=/dev/zero of=new_img.img bs=1M count=8192

lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$ sudo mkfs.ext4 new_img.img mke2fs 1.42.13 (17-May-2015)
Discarding device blocks: done
Creating filesystem with 2097152 4k blocks and 524288 inodes
Filesystem UUID: 8ec00795-655a-43aa-b2a0-652897a1ce23
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$

lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$ sudo mount -o loop new_img.img mount/ lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$ sudo cp -ar -p rootfs-friendlycore-arm64-20190718/* mount/

lake@localhost:~/rk/Neno-FriendlyELEC-RK3399-201907$ sudo umount mount/