为什么RHEL 6上没有ASMLIB?

有些人简单解释为Oracle为了推广自家的Oracle Linux而特意为之，实际上这一评价是不公允的。

ASMLIB的特殊性是它有部分Linux Kernel内核级别的组件， 而Kernel的开放与否完全取决于Kernel内核的维护者，对于Red Hat Enterprise Linux而言是Redhat公司。 由于Redhat公司从RHEL 6这个版本开始决定从Kernel中移除ASMLIB，并且不再给与Oracle公司对于该部分内核代码的访问修改权利，这直接导致Oracle不可能build出FOR RHEL 6的ASMLIB版本，因此显然这是Redhat的问题，而非O记得问题。

 http://www.askmaclean.com/archives/why-no-asmlib-redhat-linux6.html

注意ASMLIB仅仅是不支持原生态的RHEL 6的Kernel，这不代表在RHEL 6上不可能用ASMLIB。Metalink文档介绍了相关信息：

What is ASMLib?

ASMLib is free, optional software for the Automatic Storage Management (ASM) feature of Oracle Database that simplifies the management and discovery of ASM disks and makes I/O processing and kernel resource usage with ASM storage more efficient. ASMLib is not required to use the Automatic Storage Management (ASM) feature of Oracle Database on Linux and all features and functionality of ASM will work without ASMLib.

Software Update Policy for ASMLib running on Red Hat Enterprise Linux

Oracle provides ASMLib software and support for customers who receive Red Hat Enterprise Linux (RHEL) operating system support from Red Hat and have a valid Oracle database support contract. Only the latest release of ASMLib will be provided for new Linux kernels released with each new RHEL minor release (“Update”). For example, if Red Hat were to release kernel 2.6.18-194.0.1.el5, Oracle will only release the latest version of ASMLib, say 2.0.5, for that kernel. Oracle will not release any pr