dd error: resource busy

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# 执行dd命令

sudo dd if=CentOS7.dmg of=/dev/disk2s4 bs=1m

# PROBLEM dd: /dev/disk2s4: Resource busy

# 查看磁盘

df -h

# 有一行类似 /dev/disk2s4 30408672 11016960 19391712 37% 0 0 100% /Volumes/CentOS


# SOLUTION

# osx用disk1、disk2来标识不同的物理磁盘,用disk2s1、disk2s2…表示disk1的第一和第二分区
# linux下用sda、sdb来标识不同的物理磁盘,用sda1、sda2…来表示同一磁盘不同的分区

# umount /dev/disk2

sudo diskutil umount /dev/disk2s2

# 再次执行

sudo dd if=CentOS7.dmg of=/dev/disk2 bs=1m

# 查看写入状态

iostat -w 2

# 遗留问题,在MAC上写盘,总是写不成功,一直写到溢出
# 估计是应该把/dev/disk2改成/dev/disk2c1,未尝试,已写坏两个U盘

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