Sure, I've seen that, but with so little information, the realm of possibilities is pretty large. If your servers rebooted unexpectedly, I'd start by figuring out why. My guess is that if something rebooted them suddenly, they may have a lingering issue accessing the storage or maybe the storage array was also restarted and maybe it has issues as well.
If you have a specific error message or better problem statement than (paraphrasing) "ASM won't come up", you'd be more likely to get useful responses. When very little information is input, very little useful information is likely to come out.
Dan Enkhbold wrote:
We using DELL PE Servers (2 DB nodes, Oracle 10g RAC) and EMC storage. Theyhave been rebooted suddenly. After that we tried to bring up Oracle ASM but it does not give a success. Do you have any experience on that? Please share me.