15096, 0000, "lost disk write detected"
*Cause: A failure either by disk hardware or disk software caused a disk
write to to be lost, even though ASM received acknowledgement that
the write completed. Alternatively, a clustering hardware failure
or a clustering software failure resulted in an ASM instance
believing that another ASM instance had crashed, when in fact it
was still active.
*Action: The disk group is corrupt and cannot be recovered. The disk group
must be recreated, and its contents restored from backups.