我有4个硬盘，系统安装在/dev/sda2上
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 884G 2.1G 836G 1% /
/dev/sda3 2.0G 159M 1.7G 9% /tmp
/dev/sda1 99M 18M 77M 19% /boot
tmpfs 7.9G 0 7.9G 0% /dev/shm
fdisk -l
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 119040 956084377+ 83 Linux
/dev/sda3 119041 119301 2096482+ 83 Linux
/dev/sda4 119302 121601 18474750 5 Extended
/dev/sda5 119302 121601 18474718+ 82 Linux swap / Solaris
Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 121601 976760001 83 Linux
Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 121601 976760001 83 Linux
Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdd1 1 121601 976760001 83 Linux
我想要对所有 4 个 HDD 进行 Raid 0：
mdadm -C /dev/md0 --level=raid0 --raid-devices=4 /dev/sda2 /dev/sdb1 /dev/sdc1 /dev/sdd1
mdadm: Cannot open /dev/sda2: Device or resource busy
mdadm: create aborted
答案1
- 您已将 /dev/sda2 安装为根分区，它是忙碌的。
- 将其作为条带集 (RAID0) 的一部分将会破坏其上当前的所有数据。
制作 4 个磁盘带区组将使丢失数据的可能性增加约 4 倍。
我怀疑你是否想做你正在尝试做的事情......