ASM & grid infraestructure in 11gR2 - question about services

Hi all,
I have completed my first installation of 11g (it is R2). then, by trying to create the ASM instance (for stand alone dbs), I found that Grid Infrastructure
was a mandatory component in order to create the ASM instance.
Now, ASM is in place and running fine, but I found a lot of new services (ohasd, diskmon and so on)
Below is the output:
oracle 30695 1 0 Oct04 ? 00:00:08 /u01/app/oracle/product/11gR2/grid/bin/ohasd.bin reboot
oracle 32171 1 0 Oct04 ? 00:03:52 /u01/app/oracle/product/11gR2/grid/bin/oraagent.bin
oracle 32186 1 0 Oct04 ? 00:00:01 /u01/app/oracle/product/11gR2/grid/bin/tnslsnr LISTENER -inherit
oracle 32364 1 0 Oct04 ? 00:00:07 /u01/app/oracle/product/11gR2/grid/bin/cssdagent
oracle 32366 1 0 Oct04 ? 00:00:14 /u01/app/oracle/product/11gR2/grid/bin/orarootagent.bin
oracle 32382 1 0 Oct04 ? 00:00:00 /u01/app/oracle/product/11gR2/grid/bin/diskmon.bin -d -f
oracle 32394 1 0 Oct04 ? 00:00:00 /u01/app/oracle/product/11gR2/grid/bin/ocssd.bin
oracle 32604 1 0 Oct04 ? 00:00:00 asm_pmon_+ASM
oracle 32606 1 0 Oct04 ? 00:00:00 asm_vktm_+ASM
oracle 32610 1 0 Oct04 ? 00:00:00 asm_gen0_+ASM
oracle 32612 1 0 Oct04 ? 00:00:00 asm_diag_+ASM
My question is as follow:
Which is the right procedure, and which order should I folow, in order to stop and start all this stuff?
Replies will be appreciated.
Thanks
Gustavo

I want to make sure I understand the startup and shutdown process for RAC:
Will crsctl stop cluster or crsctl stop crs stop database if it hadn't already been stopped? If yes, then why run srvctl stop database?
crsctl stop cluster -all
- stops the cluster stack however Oracle High Availability Service is still running
- resources do not failover
crsctl stop cluster-n <server_name>
- stops the cluster stack on one node however Oracle High Availability Service (OHAS) is still running
- resources do not failover
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- this includes database, services, asm, clusteware and ohas on local node
- resources failover
crsctl stop has
- Is this only specific to Oracle Restart and Grid Standalone Server installation or can it be used for RAC?
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- this includes database, services, asm, clusteware and ohas on local node
Order of shutdown for single node to be rebooted and resources NOT to be available
- srvctl stop database -d <db_name> -i <instance_name>
- crsctl stop cluster -n <server_name>
- crsctl stop has
-----Is crsctl stop has needed?
Order of shutdown for single node to be rebooted and resources TO BE available
- srvctl stop database -d <db_name> -i <instance_name>
- crsctl stop crs
-----Is crsctl stop has needed?
Order of shutdown Clusterwide to be rebooted
- srvctl stop database -d <db_name> -i <instance_name>
- crsctl stop cluster -all
- crsctl stop has
-----Is crsctl stop has needed?
I appreciate any validation of my understanding.

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ASM & grid infraestructure in 11gR2 - question about services

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