REMOVING ORACLE 10G 64BIT

Question

Could someone please explain brielfy to me how to uninstall the above? I inadvertently downloaded the wrong bit and installed it. If the installer is involved how would you start the installer up?
Thanks for any help you can give.
al

Answer 1

Oracle 10.2 RAC Un-Installation
1.     Stop CRS
     # /sbin/init.d/init.crs stop
Or     # crsctl stop crs
2.     Delete CRS daemons from inittab
     Copy inittab before delete daemons
     # cp /etc/inittab /etc/inittab_beforecrsunistall
     # vi /etc/inittab
     Delete the following 3 CRS daemons from inittab
          h1:3:respawn:/sbin/init.d/init.evmd run >/dev/null 2>&1 </dev/null
          h2:3:respawn:/sbin/init.d/init.cssd fatal >/dev/null 2>&1 </dev/null
          h3:3:respawn:/sbin/init.d/init.crsd run >/dev/null 2>&1 </dev/null
3.     Remove RDBMS binaries / Software
Option1:
     Use OUI to un-install software
Option2:
     # cd $ORACLE_HOME
     # rm –rf [A-z]*
     # cd $ORA_ASM_HOME
     # rm –rf [A-z]*
     # cd $ORACLE_BASE
     # rm –rf admin oraInventory
     # cd $ORA_CRS_HOME
     # rm –rf [A-z]*
4.     Delete contents of oratab
     # vi /etc/oratab
     Delete ASM1: …
          HCPRD: …
5.     Delete Oracle Inventory directory
     # rm –r /var/opt/oracle
6.     Cleanup Storage:
Clean up OCR and VOTING disk contents
Change into exclusive/shared mode before wipe the CRS headers:
# vgdisplay vgqascrs
     If volume group not activated, then activate using vgchange
# vgchange -a s /dev/vgqascrs
     # dd if=/dev/zero bs=1024 of=/dev/vgqascrs/rlvqasocr count=1015808
     # dd if=/dev/zero bs=1024 of=/dev/vgqascrs/rlvqasvote count=1015808
Delete the headers from the ASM data and log disks
     # dd if=/dev/zero bs=1024 of=/dev/vghcmdat/rlvhcmdat1 count=16834
     # dd if=/dev/zero bs=1024 of=/dev/vghcmdat/rlvhcmdat2 count=16834
     # dd if=/dev/zero bs=1024 of=/dev/vghcmlog/rlvhcmlog1 count=16834
     # dd if=/dev/zero bs=1024 of=/dev/vghcmlog/rlvhcmlog2 count=16834