After add (in a wrong way)  a new disk in ASM, cluster don´t start

Hi,
Environment:
Oracle RAC 10gR2
2 nodes windows 2003 advanced server (node1 called "database1" and node2 called "database2").
ASM
san storage
Case:
My client has tried to add a new disk (in a environment san) in ASM with the next steps:
1. database1 and database2 are up.
2. instance ASM1 from database is up and instance ASM2 from database2 is down (I don´t know why¿¿¿¿¿¿¿??????????).
3. add a new disc from san storage to instance ASM1. At the end, a lot of errors show in screen due to  instance ASM2 was down.
4. client tried to up +ASM2 and then , all the cluster crashed.
5. reboot boths nodes database1 and database2 , and Windows 2003 Server don´t start well (hung up, due to services from oracle cluster are "automatically start"-
6. disable oracle services in "not automatically start" and windows 2003 server start well.
7. now oracle rac don´t start, ASM don start, instances don´t start ....
what can I do? any idea?
Regards.
Laura

Did you try to bring the U1 and it's associated ASM instance up while the other node is shutdown? Are you using Oracle clusterware?

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