Unix Revolution

 So.... I am up at 3AM troubleshooting an "issue" that mysteriously appeared when our DBAs restart CRS/ASM/WTH earlier during some maintenance.  Apparently ASM was unable to find 3 devices. In this example 0c32 is a known-good and 0c33 is a suspected-bad. dd if=/dev/mpath/ITSHDS06_0c35p1 bs=8 skip=13 count=4 2>/dev/null|strings TT6SMS_DATA01 [root@smsdba01 mapper]# dd if=/dev/mpath/ITSHDS06_0c32p1 bs=8 skip=13 count=6 2>/dev/null|strings TT6SMS_DATA01 TT6SMS_DATAASM31 [root@smsdba01 mapper]# /etc/init.d/oracleasm querydisk /dev/mpath/ITSHDS06_0c32p1 Device "/dev/mpath/ITSHDS06_0c32p1" is marked an ASM disk with the label "TT6SMS_DATAASM31"   [root@ttgllpsmsdba01 mapper]# dd if=/dev/mpath/ITSHDS06_0c33p1 bs=8 skip=13 count=6 2>/dev/null|strings TT6SMS_DATA01 TT6SMS_DATAASM32 [root@ttgllpsmsdba01 mapper]#  /etc/init.d/oracleasm querydisk /dev/mpath/ITSHDS06_0c33p1 Device "/dev/mpath/ITSHDS06_0c33p1" defines a device with no labe...