ASM磁盘组由哪些物理磁盘组成？

 root 用户身份创建 ASM 磁盘。

# /etc/init.d/oracleasm createdisk VOL1 /dev/sdc1

Marking disk "/dev/sdc1" as an ASM disk:                   [  OK  ]

# /etc/init.d/oracleasm createdisk VOL2 /dev/sdd1

Marking disk "/dev/sdd1" as an ASM disk:                   [  OK  ]

# /etc/init.d/oracleasm createdisk VOL3 /dev/sde1

Marking disk "/dev/sde1" as an ASM disk:                   [  OK  ]

Verify that the ASM disks are visible from every node.

# /etc/init.d/oracleasm scandisks

Scanning system for ASM disks:                      [  OK  ]

# /etc/init.d/oracleasm listdisks

VOL1

VOL2

VOL3

如果通过ASM磁盘或是磁盘组找到ASM磁盘对应的物理磁盘呢？

#/etc/init.d/oracleasm querydisk -d VOL1

Disk "VOL1" is a valid ASM disk on device [8, 33]

 #ll /dev/sd*1

brw-r----- 1 root disk 8,  1 Apr 12 16:38 /dev/sda1

brw-r----- 1 root disk 8, 17 Apr 12 16:39 /dev/sdb1

brw-r----- 1 root disk 8, 33 Apr 12 16:39 /dev/sdc1

brw-r----- 1 root disk 8, 49 Apr 12 16:39 /dev/sdd1

可知VOL1 是由 /dev/sdc1 构建