In Release 2 of Oracle 11g have seen huge changes in terms of the sub-clustering, especially for those who install the cluster and a clean machine using ASM as storage for the database (eg those using standard edition). In fact, excluding those who do I upgrade and those who wish to use a cluster file system for the datafile (and thus have enterprise edition), ASM becomes an almost mandatory in my opinion also the best ever.
The new features include OCR and voting disk in particular: using ASM, you no longer need two raw partitions to house them, but Grid Infrastructure stores them as files in ASM.
In ASM filesystem is not only the unique name of the database in standard OFA, also the directory of the cluster (eg test-cluster), containing the SPFILE for ASM and OCR, called REGISTRY .*.* in OFA standard. The cluster name is given during installation.
The number of voting disk redundancy depends on the ASM diskgroup: If the redundancy is external , you can have only one voting disk, if it is normal up to 3, if it is high to 5.
In addition, it appears that the voting disk is saved only one of the disks that make up the disk group , as seen from the "query" following a multi-disk group:
crsctl $ query css votedisk
# # File Status Universal Disk group
Id File Name - ----- ----------------- --------- ---------
1. ONLINE 17a34e19b0e04ff0bf6b161d8ec83efc (ORCL: ASMDISK1) [DGDATA]
Located 1 voting disk (s).
while the OCR looks more "normal"
ASMCMD [+ DGDATA / test-cluster / OCRFILE]> ls-l Type
overflowed Striped Time Sys Name
OCRFILE UNPROTO COARSE November 2005 22:00:00 Y REGISTRY. 255.699705373
The documentation clearly says that, with Clusterware 11.2, there is no need to backup the voting disk, because their management is automatic backup included.
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