原文博客链接地址：10gR2 rac如何重跑root.sh ？
前几天遇到一客户的10205 rac,出现LMD进程IPC SEND TIMEOUT问题。准备深入研究下Oracle RAC
的LMON,LMD以及LMS进程，发现自己的VM RAC无法启动了，最后看了下，居然是有个节点的分区不见了。
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[root@rac2 raw]# ls -ltr /dev/sdf* brw-r----- 1 root disk 8, 84 Dec 4 2013 /dev/sdf4 brw-r----- 1 root disk 8, 83 Dec 4 2013 /dev/sdf3 brw-r----- 1 root disk 8, 82 Dec 4 2013 /dev/sdf2 brw-r----- 1 root disk 8, 81 Dec 4 2013 /dev/sdf1 brwxrwxr-x 1 oracle oinstall 8, 80 Dec 4 2013 /dev/sdf [root@rac2 bin]# cat /etc/rc.d/rc.local #!/bin/sh # # This script will be executed *after* all the other init scripts. # You can put your own initialization stuff in here if you don't # want to do the full Sys V style init stuff. touch /var/lock/subsys/local chown -R oracle:oinstall /dev/sdf chown -R oracle:oinstall /dev/sde chown -R oracle:oinstall /dev/sdb chown -R oracle:oinstall /dev/sdd chown -R oracle:oinstall /dev/sdc chmod -R 775 /dev/sdf chmod -R 775 /dev/sde chmod -R 775 /dev/sdb chmod -R 775 /dev/sdd chmod -R 775 /dev/sdc raw /dev/raw/raw1 /dev/sdf1 raw /dev/raw/raw2 /dev/sdf2 raw /dev/raw/raw3 /dev/sdf3 raw /dev/raw/raw4 /dev/sdf4 chown -R oracle:dba /dev/raw |
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[root@rac1 bin]# partprobe [root@rac1 bin]# ls -ltr /dev/sdf* brwxrwxr-x 1 oracle oinstall 8, 80 Jun 29 01:37 /dev/sdf [root@rac1 bin]# |
我这里是将其中一个共享盘进行了分区，然后绑定为raw。发现其中一个节点的分区不见了，最后把节点2
reboot之后，2个节点的分区都看不到了。无语了。
印象中Linux有一些方法可以恢复partition，尝试使用gpart来试试，如下是我尝试：
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[root@rac1 repodata]# gpart /dev/sdf Begin scan... End scan. Checking partitions... Ok. Guessed primary partition table: Primary partition(1) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Primary partition(2) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Primary partition(3) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Primary partition(4) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r [root@rac1 repodata]# gpart -W /dev/sdf /dev/sdf Begin scan... End scan. Checking partitions... Ok. Guessed primary partition table: Primary partition(1) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Primary partition(2) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Primary partition(3) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Primary partition(4) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Edit this table (y,n) : y Edit which partition (1..4, q to quit) : q Activate which partition (1..4, q to quit) : 1 Write this partition table (y,n) : y * Warning: partition table written, you should reboot now. [root@rac1 repodata]# ls -ltr /dev/sdf* brwxrwxr-x 1 oracle oinstall 8, 80 Jun 29 03:57 /dev/sdf |
大家可以看到，我这里gpart扫出来的，虽然能看到有4个分区，但是全是空的。不知道为什么，太怪异了。
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[root@rac1 ~]# fdisk -l Disk /dev/sda: 21.4 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 6 48163+ 8 |