Archive for August, 2009
ASM使用AIX raw disk的问题
Thursday, August 20th, 2009
同事在10G DOCS上看到，AIX下如果绕过VG，直接使用裸盘做ASM，当设备的PVID变化时，会引起磁盘组数据丢失
今天晚上做了测试
首先清除掉了hdiskpowerx上的pvid,发现再启动ASM的时候，mount dg出错了，
–清除pvid,lspv显示pvid为none
root@crmg_pri:/>chdev -l hdiskpower12 -a pv=clear
hdiskpower12 changed
root@crmg_pri:/>chdev -l hdiskpower13 -a pv=clear
hdiskpower13 changed
root@crmg_pri:/>chdev -l hdiskpower14 -a pv=clear
hdiskpower14 changed
root@crmg_pri:/>chdev -l hdiskpower15 -a pv=clear
hdiskpower15 changed
–mount diskgroup，报错磁盘不足，盘头信息已经不对了
@>alter diskgroup dg1 mount;
alter diskgroup dg1 mount
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15063: ASM discovered an insufficient number of disks for diskgroup “DG1″
–查看磁盘头状态，为PROVISIONED
@>select state,mode_status,mount_status,header_status from v$asm_disk;
STATE MODE_STATUS MOUNT_STATUS HEADER_STATUS
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