Environment:
OS: Linux ocloud 2.6.18-164.el5 #1 SMP Thu Sep 3 04:15:13 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
ASM_INSTANCE:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
PL/SQL Release 11.2.0.4.0 - Production
CORE 11.2.0.4.0 Production
TNS for Linux: Version 11.2.0.4.0 - Production
NLSRTL Version 11.2.0.4.0 - Production
Declare:
This is a single db server with grid infrastructure.
After once restarted the pc server, the asm instance started successfully but could not find the disks.
[root@ocloud ~]# crs_stat -t Name Type Target State Host ------------------------------------------------------------ ora.DATA.dg ora....up.type ONLINE OFFLINE ora....ER.lsnr ora....er.type ONLINE ONLINE ocloud ora.asm ora.asm.type ONLINE ONLINE ocloud ora.cssd ora.cssd.type ONLINE ONLINE ocloud ora.diskmon ora....on.type OFFLINE OFFLINE ora.evmd ora.evm.type ONLINE ONLINE ocloud ora.key.db ora....se.type ONLINE OFFLINE ora.ons ora.ons.type OFFLINE OFFLINE [root@ocloud ~]# service oracleasm listdisks [root@ocloud ~]# service oracleasm scandisks Scanning the system for Oracle ASMLib disks: [ OK ] [root@ocloud ~]# service oracleasm listdisks [root@ocloud ~]# /var/log/oracleasm Reloading disk partitions: done Cleaning any stale ASM disks... Scanning system for ASM disks... oracleasm-read-label: Unable to open device "/dev/dm-0": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-0": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-0": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-0": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-1": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-1": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-1": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-1": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-2": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-2": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-2": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-2": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-3": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-3": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-3": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-3": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-4": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-4": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-4": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-4": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-5": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-5": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-5": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-5": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-6": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-6": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-6": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-6": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-7": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-7": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-7": No such file or directory oracleasm-read-label: Unable to open device "/dev/dm-7": No such file or directory
Check the /sys/block as follows:
[root@ocloud ~]# ls /sys/block
dm-0 dm-2 dm-4 dm-6 fd0 md0 ram1 ram11 ram13 ram15 ram3 ram5 ram7 ram9 sdb
dm-1 dm-3 dm-5 dm-7 hdc ram0 ram10 ram12 ram14 ram2 ram4 ram6 ram8 sda
[root@ocloud ~]# udevinfo -a -p /sys/block/dm-0
Udevinfo starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.
looking at device ‘/block/dm-0‘:
KERNEL=="dm-0"
SUBSYSTEM=="block"
SYSFS{stat}==" 93931 0 2582466 706162 206406 0 1644040 410876 0 278463 1117329"
SYSFS{size}=="189005824"
SYSFS{removable}=="0"
SYSFS{range}=="1"
SYSFS{dev}=="253:0”eg:
#KERNEL=="dm-[0-9]*", ACTION=="add", OPTIONS+="ignore_device"
#KERNEL=="dm-[0-9]*", ACTION=="add", OPTIONS+="ignore_device"
KERNEL=="dm-0", SUBSYSTEM=="block", SYSFS{size}=="189005824", SYSFS{dev}=="253:0"
KERNEL=="dm-1", SUBSYSTEM=="block", SYSFS{size}=="20447232", SYSFS{dev}=="253:1"
KERNEL=="dm-2", SUBSYSTEM=="block", SYSFS{size}=="4194304", SYSFS{dev}=="253:2"
KERNEL=="dm-3", SUBSYSTEM=="block", SYSFS{size}=="4194304", SYSFS{dev}=="253:3"
KERNEL=="dm-4", SUBSYSTEM=="block", SYSFS{size}=="10485760", SYSFS{dev}=="253:4"
KERNEL=="dm-5", SUBSYSTEM=="block", SYSFS{size}=="10485760", SYSFS{dev}=="253:5"
KERNEL=="dm-6", SUBSYSTEM=="block", SYSFS{size}=="10485760", SYSFS{dev}=="253:6"
KERNEL=="dm-7", SUBSYSTEM=="block", SYSFS{size}=="10485760", SYSFS{dev}=="253:7”
[root@ocloud rules.d]# start_udev [root@ocloud rules.d]# service oracleasm scandisks Scanning the system for Oracle ASMLib disks: [ OK ] [root@ocloud rules.d]# service oracleasm listdisks VOL1 VOL2 VOL3 VOL4 VOL5 VOL6 [grid@ocloud ~]$ crsctl stop resource -all CRS-2500: Cannot stop resource ‘ora.diskmon‘ as it is not running CRS-2500: Cannot stop resource ‘ora.ons‘ as it is not running CRS-2673: Attempting to stop ‘ora.evmd‘ on ‘ocloud‘ CRS-2673: Attempting to stop ‘ora.asm‘ on ‘ocloud‘ CRS-2673: Attempting to stop ‘ora.LISTENER.lsnr‘ on ‘ocloud‘ CRS-2677: Stop of ‘ora.evmd‘ on ‘ocloud‘ succeeded CRS-2677: Stop of ‘ora.LISTENER.lsnr‘ on ‘ocloud‘ succeeded CRS-2677: Stop of ‘ora.asm‘ on ‘ocloud‘ succeeded CRS-2673: Attempting to stop ‘ora.cssd‘ on ‘ocloud‘ CRS-2677: Stop of ‘ora.cssd‘ on ‘ocloud‘ succeeded CRS-4000: Command Stop failed, or completed with errors. [grid@ocloud ~]$ crsctl start resource -all CRS-2501: Resource ‘ora.ons‘ is disabled CRS-2672: Attempting to start ‘ora.LISTENER.lsnr‘ on ‘ocloud‘ CRS-2672: Attempting to start ‘ora.cssd‘ on ‘ocloud‘ CRS-2672: Attempting to start ‘ora.diskmon‘ on ‘ocloud‘ CRS-2672: Attempting to start ‘ora.evmd‘ on ‘ocloud‘ CRS-2676: Start of ‘ora.diskmon‘ on ‘ocloud‘ succeeded CRS-2676: Start of ‘ora.evmd‘ on ‘ocloud‘ succeeded CRS-2676: Start of ‘ora.LISTENER.lsnr‘ on ‘ocloud‘ succeeded CRS-2676: Start of ‘ora.cssd‘ on ‘ocloud‘ succeeded CRS-2672: Attempting to start ‘ora.asm‘ on ‘ocloud‘ CRS-2676: Start of ‘ora.asm‘ on ‘ocloud‘ succeeded CRS-2672: Attempting to start ‘ora.DATA.dg‘ on ‘ocloud‘ CRS-2676: Start of ‘ora.DATA.dg‘ on ‘ocloud‘ succeeded CRS-2672: Attempting to start ‘ora.key.db‘ on ‘ocloud‘ CRS-2676: Start of ‘ora.key.db‘ on ‘ocloud‘ succeeded CRS-4000: Command Start failed, or completed with errors. [grid@ocloud ~]$ crs_stat -t Name Type Target State Host ------------------------------------------------------------ ora.DATA.dg ora....up.type ONLINE ONLINE ocloud ora....ER.lsnr ora....er.type ONLINE ONLINE ocloud ora.asm ora.asm.type ONLINE ONLINE ocloud ora.cssd ora.cssd.type ONLINE ONLINE ocloud ora.diskmon ora....on.type OFFLINE OFFLINE ora.evmd ora.evm.type ONLINE ONLINE ocloud ora.key.db ora....se.type ONLINE ONLINE ocloud ora.ons ora.ons.type OFFLINE OFFLINE [grid@ocloud ~]$The ASM instance start successfully!
oracle asm service can not find disks which are configured available when restart server
原文：http://blog.csdn.net/ora_raymond/article/details/20381367