Oracle : Ошибка ORA-15063

"ASM discovered an insufficient number of disks for diskgroup \"%s\""
*Cause: ASM was unable to find a sufficient number of disks belonging to the
diskgroup to continue the operation.
*Action: Check that the disks in the diskgroup are present and functioning,
that the owner of the ORACLE binary has read/write permission to
the disks, and that the ASM_DISKSTRING initialization parameter
has been set correctly. Verify that ASM discovers the appropriate
disks by querying V$ASM_DISK from the ASM instance.

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