Queries on ASM

Question

Hi All,
I have certain queries on ASM:
1)
create diskgroup DATA normal redundancy
failgroup fg1 disk '/dev/rhdisk5' name a1
failgroup fg2 disk '/dev/rhdisk6' name b2;
if i issue above command and after that i add one datafile to above diskgroup
i want to know how the datafile is distributed in the above DATA diskgroup
i want to know whether 50 % will be stored in failgroup fg1 and another 50% will stored in failgroup fg2(please correct if i am wrong in the statement marked in bold)
2)
if the failgroup fg1 becomes unavailable due to disk corruption or if i have dropped failgroup fg1
i want to know if the data in fg1 will be moved to fg2
3)
create diskgroup DATA normal redundancy
failgroup fg1 disk '/dev/rhdisk5','/dev/rhdisk6'
failgroup fg2 disk '/dev/rhdisk7' ,'/dev/rhdisk8';
i want to know if i add one datafile in above statement how that the data will be stored in the data
i want to know whether 50 % will be stored in failgroup fg1 and another 50% will stored in failgroup fg2(please correct if i am wrong in the statement marked in bold)
if the above statement is correct then how the data is distributed between '/dev/rhdisk5','/dev/rhdisk6' in the failgroup fg1
I want to know if disk '/dev/rhdisk5' becomes unavailable then what will be happen?
Thanks

Answer 1

Since you didn't tell us your version, please read this following guide completely. All the answers are there,
http://download.oracle.com/docs/cd/E11882_01/server.112/e10500/toc.htm
And get this book,
http://www.amazon.com/Oracle-Automatic-Storage-Management-Under/dp/0071496076
HTH
Aman....