使ASM磁盘组中的离线磁盘上线

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先查看是否有离线磁盘，使用lsdg命令结果如下：
ASMCMD> lsdg
State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name
MOUNTED NORMAL N 512 4096 1048576 409600 407781 0 203890 2 N DATA/
MOUNTED NORMAL N 512 4096 1048576 6144 5954 0 2977 1 N OCR/
MOUNTED NORMAL N 512 4096 1048576 204800 204319 0 102159 1 N RECOVERY/
MOUNTED NORMAL N 512 4096 1048576 6144 5522 0 2761 1 Y VOTE/
逐个磁盘组的将离线磁盘上线，使用online命令：
ASMCMD> online -G vote -a
ASMCMD> online -G data
ASMCMD> online -G ocr -a
ASMCMD> online -G recovery -a
ASMCMD> lsdg
State Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name
MOUNTED NORMAL N 512 4096 1048576 819200 815562 204800 305381 0 N DATA/
MOUNTED NORMAL N 512 4096 1048576 9216 8931 3072 2929 0 N OCR/
MOUNTED NORMAL N 512 4096 1048576 409600 408638 0 204319 0 N RECOVERY/
MOUNTED NORMAL N 512 4096 1048576 9216 8249 3072 2588 0 Y VOTE/
命令语法是online -G 磁盘组名，后面的-a参数加不加都可以，不知道什么意思,还可加上-D参数，用法：online -G vote -D hdisk21，只online指定的磁盘。

查看磁盘组中的磁盘可使用lsdsk -k命令：
ASMCMD> lsdsk -k
Total_MB Free_MB OS_MB Name Failgroup Failgroup_Type Library Label UDID Product Redund Path
204800 204319 204800 RECOVERY_0000 FG1 REGULAR System UNKNOWN /dev/rhdisk20
3072 2727 3072 VOTE_0001 VOTE_0001 REGULAR System UNKNOWN /dev/rhdisk21
3072 2977 3072 OCR_0001 FG2 REGULAR System UNKNOWN /dev/rhdisk22
204800 203888 204800 DATA_0002 FG2 REGULAR System UNKNOWN /dev/rhdisk23
204800 203893 204800 DATA_0003 FG2 REGULAR System UNKNOWN /dev/rhdisk24
3072 2762 3072 VOTE_0000 VOTE_0000 REGULAR System UNKNOWN /dev/rhdisk3
204800 204319 204800 RECOVERY_0001 FG2 REGULAR System UNKNOWN /dev/rhdisk38
3072 2760 3072 VOTE_0002 VOTE_0002 REGULAR System

UNKNOWN /dev/rhdisk39
3072 2977 3072 OCR_0000 FG1 REGULAR System UNKNOWN /dev/rhdisk4
3072 2977 3072 OCR_0002 FG3 REGULAR System UNKNOWN /dev/rhdisk40
204800 203889 204800 DATA_0000 FG1 REGULAR System UNKNOWN /dev/rhdisk5
204800 203892 204800 DATA_0001 FG1 REGULAR System UNKNOWN /dev/rhdisk6