RHEL 6.x or 7.x 使用分区绑定ASM 磁盘的方法
测试环境 VMware workstation 12
VMware 启用磁盘uuid的方法： 关闭虚拟机，编辑 XXX.vmx 文件，添加如下内容
disk.EnableUUID = "TRUE"
disk.locking=false
RHEL 6.X 环境：
例如，我需要将/dev/sdc1 和 /dev/sdc5 绑定为ASM 磁盘
[root@prim ~]# fdisk -l /dev/sdc
Disk /dev/sdc: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x828454c2
Device Boot Start End Blocks Id System
/dev/sdc1 1 654 5253223+ 83 Linux
/dev/sdc2 655 2610 15711570 5 Extended
/dev/sdc5 655 1960 10490413+ 83 Linux
可以使用udevadm 命令的 info 参数查看磁盘的udev 信息：
[root@prim ~]# udevadm info --query=all --name=sdc1
P: /devices/pci0000:00/0000:00:10.0/host0/target0:0:2/0:0:2:0/block/sdc/sdc1
N: sdc1
W: 76
S: block/8:33
S: disk/by-id/scsi-36000c29bc8bb23487f1d592961d4732a-part1
S: disk/by-path/pci-0000:00:10.0-scsi-0:0:2:0-part1
S: disk/by-id/wwn-0x6000c29bc8bb23487f1d592961d4732a-part1
E: UDEV_LOG=3
E: DEVPATH=/devices/pci0000:00/0000:00:10.0/host0/target0:0:2/0:0:2:0/block/sdc/sdc1
E: MAJOR=8
E: MINOR=33
E: DEVNAME=/dev/sdc1
E: DEVTYPE=partition
E: SUBSYSTEM=block
E: ID_SCSI=1
E: ID_VENDOR=VMware_
E: ID_VENDOR_ENC=VMwarex2cx20
E: ID_MODEL=VMware_Virtual_S
E: ID_MODEL_ENC=VMwarex20Virtualx20S
E: ID_REVISION=1.0
E: ID_TYPE=disk
E: ID_SERIAL_RAW=36000c29bc8bb23487f1d592961d4732a
E: ID_SERIAL=36000c29bc8bb23487f1d592961d4732a
E: ID_SERIAL_SHORT=6000c29bc8bb23487f1d592961d4732a
E: ID_WWN=0x6000c29bc8bb2348
E: ID_WWN_VENDOR_EXTENSION=0x7f1d592961d4732a
E: ID_WWN_WITH_EXTENSION=0x6000c29bc8bb23487f1d592961d4732a
E: ID_SCSI_SERIAL=6000c29bc8bb23487f1d592961d4732a
E: ID_BUS=scsi
E: ID_PATH=pci-0000:00:10.0-scsi-0:0:2:0
E: ID_PART_TABLE_TYPE=dos
E: LVM_SBIN_PATH=/sbin
E: DEVLINKS=/dev/block/8:33 /dev/disk/by-id/scsi-36000c29bc8bb23487f1d592961d4732a-part1 /dev/disk/by-path/pci-0000:00:10.0-scsi-0:0:2:0-part1 /dev/disk/by-id/wwn-0x6000c29bc8bb23487f1d592961d4732a-part1
[root@prim ~]# udevadm info --query=all --name=sdc5
P: /devices/pci0000:00/0000:00:10.0/host0/target0:0:2/0:0:2:0/block/sdc/sdc5
N: sdc5
W: 75
S: block/8:37
S: disk/by-id/scsi-36000c29bc8bb23487f1d592961d4732a-part5
S: disk/by-path/pci-0000:00:10.0-scsi-0:0:2:0-part5
S: disk/by-id/wwn-0x6000c29bc8bb23487f1d592961d4732a-part5
E: UDEV_LOG=3
E: DEVPATH=/devices/pci0000:00/0000:00:10.0/host0/target0:0:2/0:0:2:0/block/sdc/sdc5
E: MAJOR=8
E: MINOR=37
E: DEVNAME=/dev/sdc5
E: DEVTYPE=partition
E: SUBSYSTEM=block
E: ID_SCSI=1
E: ID_VENDOR=VMware_
E: ID_VENDOR_ENC=VMwarex2cx20
E: ID_MODEL=VMware_Virtual_S
E: ID_MODEL_ENC=VMwarex20Virtualx20S
E: ID_REVISION=1.0
E: ID_TYPE=disk
E: ID_SERIAL_RAW=36000c29bc8bb23487f1d592961d4732a
E: ID_SERIAL=36000c29bc8bb23487f1d592961d4732a
E: ID_SERIAL_SHORT=6000c29bc8bb23487f1d592961d4732a
E: ID_WWN=0x6000c29bc8bb2348
E: ID_WWN_VENDOR_EXTENSION=0x7f1d592961d4732a
E: ID_WWN_WITH_EXTENSION=0x6000c29bc8bb23487f1d592961d4732a
E: ID_SCSI_SERIAL=6000c29bc8bb23487f1d592961d4732a
E: ID_BUS=scsi
E: ID_PATH=pci-0000:00:10.0-scsi-0:0:2:0
E: ID_PART_TABLE_TYPE=dos
E: LVM_SBIN_PATH=/sbin
E: DEVLINKS=/dev/block/8:37 /dev/disk/by-id/scsi-36000c29bc8bb23487f1d592961d4732a-part5 /dev/disk/by-path/pci-0000:00:10.0-scsi-0:0:2:0-part5 /dev/disk/by-id/wwn-0x6000c29bc8bb23487f1d592961d4732a-part5
我们可以使用上面标记的属性来做个udev策略，重新绑定ASM磁盘
vi /etc/udev/rules.d/99-oracle-asmdevices.rules
添加如下内容:
ACTION=="add|change", KERNEL=="sdc[1-9]",ENV{MAJOR}=="8", ENV{MINOR}=="33",ENV{ID_SERIAL}=="36000c29bc8bb23487f1d592961d4732a",NAME="asm-disk1", OWNER="grid", GROUP="dba", MODE="0660"
ACTION=="add|change", KERNEL=="sdc[1-9]",ENV{MAJOR}=="8", ENV{MINOR}=="37",ENV{ID_SERIAL}=="36000c29bc8bb23487f1d592961d4732a",NAME="asm-disk2", OWNER="grid", GROUP="dba", MODE="0660"
重新加载udev规则，重新启动udev服务
udevadm control --reload-rules
start_udev 或者udevadm trigger --subsystem-match=block
检查ASM磁盘绑定结果，如下：
[root@prim rules.d]# ll /dev/asm-disk*
brw-rw---- 1 grid dba 8, 33 Aug 17 09:24 /dev/asm-disk1
brw-rw---- 1 grid dba 8, 37 Aug 17 09:24 /dev/asm-disk2
RHEL 7.X 环境：
[root@dbhost ~]# fdisk -l /dev/sdb
Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 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 label type: dos
Disk identifier: 0x06295d7d
Device Boot Start End Blocks Id System
/dev/sdb1 2048 10487807 5242880 83 Linux
/dev/sdb2 10487808 41943039 15727616 5 Extended
/dev/sdb5 10489856 31461375 10485760 83 Linux
[root@dbhost ~]# udevadm info --query=all --name=sdb1
P: /devices/pci0000:00/0000:00:10.0/host0/target0:0:1/0:0:1:0/block/sdb/sdb1
N: sdb1
S: disk/by-id/scsi-36000c2992700177f54863a9424df7060-part1
S: disk/by-id/wwn-0x6000c2992700177f54863a9424df7060-part1
S: disk/by-path/pci-0000:00:10.0-scsi-0:0:1:0-part1
E: DEVLINKS=/dev/disk/by-id/scsi-36000c2992700177f54863a9424df7060-part1 /dev/disk/by-id/wwn-0x6000c2992700177f54863a9424df7060-part1 /dev/disk/by-path/pci-0000:00:10.0-scsi-0:0:1:0-part1
E: DEVNAME=/dev/sdb1
E: DEVPATH=/devices/pci0000:00/0000:00:10.0/host0/target0:0:1/0:0:1:0/block/sdb/sdb1
E: DEVTYPE=partition
E: ID_BUS=scsi
E: ID_MODEL=VMware_Virtual_S
E: ID_MODEL_ENC=VMwarex20Virtualx20S
E: ID_PART_ENTRY_DISK=8:16
E: ID_PART_ENTRY_NUMBER=1
E: ID_PART_ENTRY_OFFSET=2048
E: ID_PART_ENTRY_SCHEME=dos
E: ID_PART_ENTRY_SIZE=10485760
E: ID_PART_ENTRY_TYPE=0x83
E: ID_PART_TABLE_TYPE=dos
E: ID_PATH=pci-0000:00:10.0-scsi-0:0:1:0
E: ID_PATH_TAG=pci-0000_00_10_0-scsi-0_0_1_0
E: ID_REVISION=1.0
E: ID_SCSI=1
E: ID_SCSI_SERIAL=6000c2992700177f54863a9424df7060
E: ID_SERIAL=36000c2992700177f54863a9424df7060
E: ID_SERIAL_SHORT=6000c2992700177f54863a9424df7060
E: ID_TYPE=disk
E: ID_VENDOR=VMware_
E: ID_VENDOR_ENC=VMwarex2cx20
E: ID_WWN=0x6000c2992700177f
E: ID_WWN_VENDOR_EXTENSION=0x54863a9424df7060
E: ID_WWN_WITH_EXTENSION=0x6000c2992700177f54863a9424df7060
E: MAJOR=8
E: MINOR=17
E: SUBSYSTEM=block
E: TAGS=:systemd:
E: USEC_INITIALIZED=4962256
[root@dbhost ~]# udevadm info --query=all --name=sdb5
P: /devices/pci0000:00/0000:00:10.0/host0/target0:0:1/0:0:1:0/block/sdb/sdb5
N: sdb5
S: disk/by-id/scsi-36000c2992700177f54863a9424df7060-part5
S: disk/by-id/wwn-0x6000c2992700177f54863a9424df7060-part5
S: disk/by-path/pci-0000:00:10.0-scsi-0:0:1:0-part5
E: DEVLINKS=/dev/disk/by-id/scsi-36000c2992700177f54863a9424df7060-part5 /dev/disk/by-id/wwn-0x6000c2992700177f54863a9424df7060-part5 /dev/disk/by-path/pci-0000:00:10.0-scsi-0:0:1:0-part5
E: DEVNAME=/dev/sdb5
E: DEVPATH=/devices/pci0000:00/0000:00:10.0/host0/target0:0:1/0:0:1:0/block/sdb/sdb5
E: DEVTYPE=partition
E: ID_BUS=scsi
E: ID_MODEL=VMware_Virtual_S
E: ID_MODEL_ENC=VMwarex20Virtualx20S
E: ID_PART_ENTRY_DISK=8:16
E: ID_PART_ENTRY_NUMBER=5
E: ID_PART_ENTRY_OFFSET=10489856
E: ID_PART_ENTRY_SCHEME=dos
E: ID_PART_ENTRY_SIZE=20971520
E: ID_PART_ENTRY_TYPE=0x83
E: ID_PART_TABLE_TYPE=dos
E: ID_PATH=pci-0000:00:10.0-scsi-0:0:1:0
E: ID_PATH_TAG=pci-0000_00_10_0-scsi-0_0_1_0
E: ID_REVISION=1.0
E: ID_SCSI=1
E: ID_SCSI_SERIAL=6000c2992700177f54863a9424df7060
E: ID_SERIAL=36000c2992700177f54863a9424df7060
E: ID_SERIAL_SHORT=6000c2992700177f54863a9424df7060
E: ID_TYPE=disk
E: ID_VENDOR=VMware_
E: ID_VENDOR_ENC=VMwarex2cx20
E: ID_WWN=0x6000c2992700177f
E: ID_WWN_VENDOR_EXTENSION=0x54863a9424df7060
E: ID_WWN_WITH_EXTENSION=0x6000c2992700177f54863a9424df7060
E: MAJOR=8
E: MINOR=21
E: SUBSYSTEM=block
E: TAGS=:systemd:
E: USEC_INITIALIZED=4962296
注： RHEL 7.X 之后 自定义udev策略不能再使用NAME属性了，而是 SYMLINK+ 来做个链接
vi /etc/udev/rules.d/99-oracle-asmdevices.rules
ACTION=="add|change", KERNEL=="sdb[1-9]",ENV{MAJOR}=="8", ENV{MINOR}=="17",ENV{ID_SERIAL}=="36000c2992700177f54863a9424df7060",SYMLINK+="asm-disk1", OWNER="grid", GROUP="dba", MODE="0660"
ACTION=="add|change", KERNEL=="sdb[1-9]",ENV{MAJOR}=="8", ENV{MINOR}=="21",ENV{ID_SERIAL}=="36000c2992700177f54863a9424df7060",SYMLINK+="asm-disk2", OWNER="grid", GROUP="dba", MODE="0660"
注: RHEL 7.X udev 多了ID_PART_ENTRY_NUMBER 属性，因此也可以用ID_PART_ENTRY_NUMBER属性来替换（MAJOR，MINOR）绑定磁盘,如下：
ACTION=="add|change", KERNEL=="sdb[1-9]",ENV{ID_PART_ENTRY_NUMBER}=="1",ENV{ID_SERIAL}=="36000c2992700177f54863a9424df7060",SYMLINK+="asm-disk1", OWNER="grid", GROUP="dba", MODE="0660"
ACTION=="add|change", KERNEL=="sdb[1-9]",ENV{ID_PART_ENTRY_NUMBER}=="5",ENV{ID_SERIAL}=="36000c2992700177f54863a9424df7060",SYMLINK+="asm-disk2", OWNER="grid", GROUP="dba", MODE="0660"
udevadm control --reload-rules
systemctl restart systemd-udevd.service
或者：
udevadm trigger --subsystem-match=block
验证结果如下：
[root@dbhost rules.d]# ll /dev/asm*
lrwxrwxrwx. 1 root root 4 Aug 17 10:01 /dev/asm-disk1 -> sdb1
lrwxrwxrwx. 1 root root 4 Aug 17 10:01 /dev/asm-disk2 -> sdb5
[root@dbhost rules.d]#
[root@dbhost rules.d]#
[root@dbhost rules.d]# ll /dev/sdb*
brw-rw----. 1 root disk 8, 16 Aug 17 10:01 /dev/sdb
brw-rw----. 1 grid dba 8, 17 Aug 17 10:01 /dev/sdb1
brw-rw----. 1 root disk 8, 18 Aug 17 10:01 /dev/sdb2
brw-rw----. 1 grid dba 8, 21 Aug 17 10:01 /dev/sdb5