A reproducible but unexplained bug: Oracle ASM behaves incorrectly when presented with 4k physical / 512-byte logical sector devices on the Unbreakable Enterprise Kernel.
Category: ASM
ASM Metadata Utilities
An introduction to Oracle's undocumented ASM metadata utilities – including kfed, the kernel file editor – and how to use them to inspect and understand ASM disk group internals.
flashdba 