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DD命令破坏了Ubuntu的分区表

tag-icon • tag-icon hard-drive dd
DD命令破坏了Ubuntu的分区表

我有两个完全相同型号和容量的硬盘，第一个/dev/sda硬盘上装有 Ubuntu Server 16.04 ( )，第二个硬盘 ( /dev/sdb) 以前是不同系统上的 RAID 配置的一部分。我想从 Ubuntu LiveCD 克隆我使用的命令/dev/sda，但命令结束后，fdisk -l 的输出显示：/dev/sdbsudo dd if=/dev/sda of=/dev/sdb

Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xcf7ffe95

Device     Boot   Start        End    Sectors  Size Id Type
/dev/sda1  *       2048     999423     997376  487M 83 Linux
/dev/sda2       1001470 1953523711 1952522242  931G  5 Extended
/dev/sda5       1001472 1953523711 1952522240  931G 8e Linux LVM


Disk /dev/sdb: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/ubuntu--vg-root: 930.1 GiB, 998663782400 bytes, 1950515200 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/ubuntu--vg-swap_1: 976 MiB, 1023410176 bytes, 1998848 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

我认为该dd命令以某种方式破坏了分区表，/dev/sdb 但这可能是什么原因造成的？

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